Viewed 2k times 0 I have the following MWE to generate a Stem-and-leaf plot. leaf = units). Plot the data from Question 1 as a histogram with a bin width of. The number of people who have an odd number of siblings. the players scored points that started with a 0. Transcript A stem and leaf is a table used to display data. This is because, as we move to continuous data, we have a range of numbers that goes right up to the lower end of the following bin, even if it doesnt include that number. You would probably get arangeof answers from zero on up. one last time. This player, let me Never seen it used in real life? Direct link to Jerry Nilsson's post Yes, precisely so. have to add up all of these numbers this represents 11. part, adding these up. Sample surveys are observational studies, not experiment. For a function to be continuous, the function must be continuous at every single point in an unbroken domain. r - How to output a stem and leaf plot as a plot - Stack Overflow Our table and histogram now looks like this. Because 99.5 falls between two rows of the display, namely between the stems 99 and 100, Minitab calculates the depths instead as . in the stem-and-leaf plot. X 100) A stem and leaf plot is a way of summarizing a set of data measured on an interval scale. So the median is 37. Direct link to Chuck Towle's post Hanifa, It is a graph that shows numerical data arranged in order. increasing percent (concave upward), Typically, the leaf contains the last digit of the number and the stem contains all of the other digits. Direct link to Michael Stanmore's post I've seen it used on a Fe, Posted 10 years ago. "Overview of the Stem-and-Leaf Plot." Direct link to Santosh Kumar's post What is the need of stem , Posted 2 years ago. The veterinarian school treated a minimum of 5 animals and a maximum of 60 animals on any one day. 1 in the tens place, The 'leaf' is on the right and displays the last digit. The result is a graph that displays the sorted data in groups, or classes. And then finally, provides insight into characteristics of a data set using mathematics. A log scale is useful for time series data that might be expected to grow at a compound annual percentage rate (e.g., GDP, the national debt, or your future income). if mean of data is 200 Statistics: Power from Data! Organizing data: Stem and leaf plots A Stem and Leaf Plot is a special table where each data value is split into a "stem" (the first digit or digits) and a "leaf" (usually the last digit). It wou, Posted 2 years ago. For example, 165.7 would have a stem of 16 and a leaf of 5, and we would just leave out the seven tenths. C] it enables us to examine the data values for the presence of trends, cycles, and seasonal variation. M separates the upper and lower halves of the ordered observations. For two-digit or three-digit integer data, the stem is the tens digit of the data, and the leaf is the ones digit. A pie chart can only convey a general idea of the data. Use the table to construct a histogram with the intervals from your frequency table. A stem and leaf plot is a type of graph to look at a data set of numbers quickly. Stem-and-Leaf Plots: Graphical Technique for Statistical Data sum of squared deviation from the mean divided by the population size ^percent(relative freq. A scatter plot is a starting point for bivariate data analysis in which we investigate the association and relationship between two variables. Some people prefer to arrange the data in order before the stems and leaves are created. Stem and leaf plots display the shape and spread of a continuous data distribution. Unlike histograms, stem-and-leaf displays retain the original data to at least two significant digits, and put the data in order, thereby easing the move to order-based inference and non-parametric statistics. sum that assigns each data a value in weight that represents a fraction of the total. A stem-and-leaf plot resembles a histogram on its side. [1] The popularity during those years is attributable to their use of monospaced (typewriter) typestyles that allowed computer technology of the time to easily produce the graphics. Format for presentation of quantitative data, Multivariate adaptive regression splines (MARS), Autoregressive conditional heteroskedasticity (ARCH), https://en.wikipedia.org/w/index.php?title=Stem-and-leaf_display&oldid=1150669164, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 19 April 2023, at 12:54. This data is arranged byplace value where the digits in the largest place are referred to as the stem, while the digits in the smallest value or values are referred to as the leaf or leaves, which are displayed to the right of the stem on the diagram. And then made a stem-and-leaf The sample correlation coefficient is a statistic that describes the degree of linearity between paired observations on two quantitative variables X and Y. Highlight1:Plot1and press[ENTER]. If you've done it correctly, it should yield a stem-and-leafplot graph that looks like the one in this section. The median of the data can be quickly calculated by using the values in the leaf column to locate the value in the middle position. A pie chart should only have a few (i.e., 2 to 5) slices. You see that most of .. (highest value-lowest value)/number of bins. The new set is obtained by the following procedure: each non-negative, observation is multiplied by two, while each negative observation is divided by two. The stem-and-leaf display is drawn with two columns separated by a vertical line. 3 in the ones place. A stem and leaf is a table used to display data. Stem-and-Leaf Plots ( Read ) | Statistics | CK-12 Foundation Definition of a Percentile in Statistics and How to Calculate It, The Difference Between the Mean, Median, and Mode, Math Glossary: Mathematics Terms and Definitions, Empirical Relationship Between the Mean, Median, and Mode. A stem-and-leaf plot consists of a vertical stem containing the first digit of each number, with the rest of each number written to the right of the stem like a leaf. In the stem and leaf plot below, the first number represented is 21. the 0's in purple. 64---7 for his ones digit. For example, the last number would be 20. http://www.khanacademy.org/math/arithmetic/interpreting-data-topic/reading_data/e/reading_stem_and_leaf_plots, http://en.wikipedia.org/wiki/Stem-and-leaf_display. As in this example below: Stem-and-leaf displays are useful for displaying the relative density and shape of the data, giving the reader a quick overview of the distribution. There is a set of observations. The 'leaf' is on the right and displays the last digit. Direct link to GayDumpsterFire's post I'm confused on making a , Posted 5 years ago. 35, 42, 38, 57, 2, 24, 27, 36, 45, 60, 38, 40, 40, 44, 1, 44, 48, 84, 38, 20, 4, 2, 48, 58, 3, 20, 6, 40, 22, 26, 17, 18, 40, 51, 62, 31, 27, 48, 35, 27, 37, 58, 21. Otherwise, you would have a long list of marks to sift through and analyze. B] it shows the percentage distribution of the data values. Direct link to zoujoe24's post The leaf number is not ac, Posted 9 years ago. 2: Visualizing Data - Data Representation, { "2.8.01:_Understand_and_Create_Stem_and_Leaf_Plots" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.8.02:_Stem-and-Leaf_Plots_and_Histograms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.8.03:_Interpreting_Stem_and_Leaf_Plots_(Stem_and_Leaf_Plots_Range_of_a_Data_Set)" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.8.04:_Two-Sided_Stem-and-Leaf_Plots" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "2.01:_Types_of_Data_Representation" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.02:_Circle_Graphs" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.03:_Bar_Graphs" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.04:_Histograms" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.05:_Frequency_Tables" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.06:_Line_Graphs" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.07:_Scatter_Plots" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.08:_Stem-and-Leaf_Plots" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "2.09:_Box-and-Whisker_Plots" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, 2.8.2: Stem-and-Leaf Plots and Histograms, [ "article:topic", "showtoc:no", "range", "stem-and-leaf plots", "data", "continuous data", "bins", "stem", "continuous", "truncate", "hundreds", "tens", "units", "decimals", "license:ccbync", "program:ck12", "authorname:ck12", "source@https://www.ck12.org/c/statistics" ], https://k12.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fk12.libretexts.org%2FBookshelves%2FMathematics%2FStatistics%2F02%253A_Visualizing_Data_-_Data_Representation%2F2.08%253A_Stem-and-Leaf_Plots%2F2.8.02%253A_Stem-and-Leaf_Plots_and_Histograms, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), 2.8.1: Understand and Create Stem and Leaf Plots, 2.8.3: Interpreting Stem and Leaf Plots (Stem and Leaf Plots, Range of a Data Set), Make Histograms Using a Graphing Calculator, Stem-and-Leaf Plots and Histograms: Digital Photography, Stem-and-Leaf Plots and Histograms - A Sample Application. The stems are listed to the left of the vertical line. The stem is everything before the final digit and the leaf is the final digit. here also got 11. In a side-by-side stem-and-leaf plot, two sets of leaves share the same stem. > The next two numbers have a common stem of 3. Legal. k = 1, 68.26% will lie within m + 1u Jo ur na l P re -p ro of Journal Pre-proof 2 ABSTRACT Plant elemental composition and stoichiometry are useful tools for understanding plant nutrient strategy and biogeochemical cycling in terrestrial ecosystems. - (ratio scale) equal distances represent equal ratios. Direct link to river.webb's post Can you make a stem and l, Posted 10 years ago. cumulative frequency right over here. You can see that although it may be counter-intuitive, sometimes you can see more information by reducing the number of intervals (or bins) in a histogram. 18 points. What is the mode and themedianof the ages? They are also useful for highlighting outliers and finding the mode. So the way to read this is, you The leaf number is not actually separate numbers. 7 for his ones digit. A stem-and-leaf display or stem-and-leaf plot is a device for presenting quantitative data in a graphical format, similar to a histogram, to assist in visualizing the shape of a distribution. Note that there are no leaves for the second stem. Scilit | Article - A multiple RT-PCR assay for simultaneous detection Direct link to Bence Csoka's post Is spacetime four dimensi, Posted 2 years ago. As for 3 facts that you know about the growth of the plants, answers will vary, but the following are some possible responses: The following stem-and-leaf plot represents the ages of 23 people waiting in line at Tim Hortons. Construct a stem-and-leaf plot for the data set, which is as follows: What is the mode and the median of the data set? Defoliation management plays a major role in ensuring eco-friendly utilization of grassland natural resources. This will ensure that the values of the leaves are in order. The leaves are to the left and the right of the stems. Make sure theXlistis the list that contains your data. This player, I'm going to didn't score anything. And then this player also When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. To create the plot, divide each observation of data into a stem and a leaf. With very large data sets, a stem-and-leaf display will become very cluttered, since each data point must be represented numerically. Make a frequency table for the data in Question 1. And there's four of them. The mode is now apparentthere are 4 zeros in a row on the 4-branch, so the mode is 40. However, stem-and-leaf displays are only useful for moderately sized data sets (around 15150 data points). Direct link to Madeline Marconi's post what happens when we have, Posted 5 years ago. I. Your IP: Connect and share knowledge within a single location that is structured and easy to search. The ages for the passengers are shown below. In statistics, data is represented in tables, charts, and graphs. The median (M) is the 50th percentile or midpoint of the ordered sample data. Direct link to Pi's post Where is Sal's key? So we get to 102 points. state where my sum is. One way to ensure that the data values are kept intact is to graph the values in a stem-and-leaf plot. Modified 2 years, 10 months ago. points that started with a 1. For example, thecontinuousline joining the number of students with one and two siblings makes it look like we know something about how many students have 1.5 siblings (which of course, is impossible). And usually the leaf will A stem-and-leaf display or stem-and-leaf plot is a device for presenting quantitative data in a graphical format, similar to a histogram, to assist in visualizing the shape of a distribution.They evolved from Arthur Bowley's work in the early 1900s, and are useful tools in exploratory data analysis.Stemplots became more commonly used in the 1980s after the publication of John Tukey's book on . relative frequency: frequency divided by total of frequency column Because 10 of those students failed the test, which accounts for almost half of the class of 22 students, the teacher might need to try a different method that the failing group of students could understand. In other words, we can say that a Stem and Leaf Plot is a table in which each data value is split into a "stem" and a "leaf." The "stem" is the left-hand column that has the tens of digits. in their ones place. The "stem" is basically on the left side that displays the first digit.However, the "leaf" is on the right side.And the main purpose of the leaf is to display the last digits. 13.2 - Stem-and-Leaf Plots | STAT 414 - PennState: Statistics Online There are a total of 11 digits, so 11 people are older than 32. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 2.1: Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs And then, let me see, I'm - distances on the Y-axis are proportional to the magnitude of the variable being displayed. The number of values in the leaf column should equal the number of data values that were given in the table. . Check out this example of test scores: The Stem shows the tens column and the leaf. Construct a side-by-side stem-and-leaf plot using this data. The above stem and leaf plot represents the grades on statistics of some group of students (stem = tenth. Now that you've had a chance to try this problem on your own, read on to see an example of the correct way to format this data set as a stem-and-leafplot graph. 20 points or over. Direct link to Mihir Sathe's post What are some application, Posted 11 years ago. https://www.thoughtco.com/stem-and-leaf-plot-an-overview-2312423 (accessed May 2, 2023). A stem-and-leaf plot is a type of graph that is similar to a histogram but shows more information by summarizing the shape of a set of data (the distribution) and providing extra detail regarding individual values. In our previous example, the median of the 64 IQs is 99.5. The next numbers are 40, 46 and 47. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Stem and Leaf plot is a device for representing quantitative data in a visual way without loss of information. So looking at the X-axis ticks shows end points of each bin. Stem and Leaf Plot - Meaning, Construction, Splitting & Examples If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Course Hero is not sponsored or endorsed by any college or university. Generally in a Stem and Leaf Plot, there is a key at the bottom. The resulting stemplot produces a distribution of the data similar to a histogram, but all of the data values are retained in a compact form. 128--8 Based on the following set of data, the stem plot below would be created: For negative numbers, a negative is placed in front of the stem unit, which is still the value X / 10. 2.1 Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs For our data above our stem would be the tens, and run from 1 to 25. This is good for very variant things, I'd say. We were able to organize the data into a table. And sometimes it's The mode is most useful for discrete or categorical data with only a few distinct data values. You can use this form of data analysis to find medians, determine totals, and define the modes of data sets, providing valuable insight into trends and patterns in large data sets. Use quartiles to detect unusual data points by defining fences Arrange the data into a stem-and-leaf plot, and use the plot to find themedianand mode ages. This player has 8 Notice the similarity between histograms and stem-and-leaf plots. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. Which of the following are true statements? DOC AP Statistics Review - Chapter 1 - Humble Independent School District Pie charts should be used to portray data which sum to a total (e.g., percent market shares). In a stemplot, each score is broken into two pieces: the stem and leaf. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. For example, you score in the 83rd percentile on a standardized test. A single stem-andleaf plot is a useful tool because: A} it includes the average and the standard deviation. declining percent (concave downward). To find the median, count all the days in the month, which in the case of June is 30. Can someone, Posted 4 years ago. Some students would have no siblings, but most would have at least one. But let's actually It is useful for finding percentiles or in comparing the shape of the sample with a known benchmark such as the normal distribution. This allowed the stem and leaf plot to retain its shape, even for more complicated data sets. A single stem-and-leaf plot is a useful tool because: It includes the average and the standard deviation, it shows the percentage distribution of the data values, it enables us to examine the data values for the presence of trends, cycles, and seasonal, it enables us to locate the centre of the data, see the overall shape of the distribution, and, look to marked deviations from the overall, it enables us to compare this dataset against others of a similar kind. Input all 43 data points into the table in columnL1. A stem and leaf plot is similar to a histogram but is usually a more informative display for relatively . The stem is a strong base from which the leaves sprout. Step 2: Write each leaf next to its corresponding stem. It is a good choice when the data sets are small. So 1, 2, 3, 4, 5, 6, 7. 1 in the tens place, scored 102 points. There is a growing recognition of the significance of unique morphological and physiological adaptation of native warm-season grasses (NWSG) of North America as summer forage resources and major grassland ecosystem components. Write the stems in a vertical column and don't skip stems just because they don't have any data. 1 in the tens place, hard to understand. Direct link to Abeer Babiker's post The stem is everything be, Posted 2 years ago. The mode of this data set is 35. While no key is present in the video, Sal seems to have a key on a separate piece of paper/in his head, the key in particular being, for example, 5|6=56, still do not get where leaf numbers come from. Create a frequency table, starting at 25 mph with a bin width of 5 mph. For instance, if you want to compare the scores of two sports teams, you can use the following stem-and-leaf plot: The tens column is now in the middle column, and the ones column is to the right and left of the stem column. When the data we are representing falls into well defined categories (such as the integers 1, 2, 3, 4, 5 & 6) it is more appropriate to use ahistogramto display that data. Construct a stem-and-leaf plot to represent the ages, and list 4 facts that you know from the graph. And when you first look at Cloudflare Ray ID: 7c0d7624b8adb97a In this example, the tens digits are stems, and the one digits form the leaves. Did I do that right? is a line graph of the cumulative frequencies. the tens digits. To illustrate this, here are some examples. (d) It enables one to see the overall shape of a distribution. Direct link to Tsknott's post This is good for very var, Posted 6 months ago. These values range from 2.3 to 8.9. However, this is not necessary and can take a great deal of time if the data set is large. This will ensure that the values of the leaves are in order. . put a blank there. ^percent(cumulative freq X 100). answer the question that they're asking And the way to interpret A side-by-side stem-and-leaf plot allows a comparison of the two data sets in two columns. The following two examples illustrate how to create a stem-and-leaf plot from scratch for a given dataset. Make and interpret stem-and-leaf plots and histograms for a set of data. 41.1, 254.7, 91.6, 60.9, 75.6, 36.0, 16.5, 10.6, 62.2, 89.4, 124.9, 176.7, 121.6, 135.6, 141.6, 77.0, 82.8, 28.9, 6.7, 22.1, 29.9, 110.0, 179.3, 97.6, 176.8, 143.5, 129.8, 94.9, 77.0, 60.8, 60.0, 32.5, 61.7, 117.2, 194.5, 208.6, 176.8, 143.5, 129.8, 94.9, 77.0, 60.8, 20.0, 32.5, 61.7, 117.2, 194.5, 208.6, 133.1, 105.2, 92.0, 60.7, 52.8, 37.8, 14.8, 23.1, 41.3, 75.7, 134.6, 148.8. ______ can be used to study the relationship between two variables. There was no growth recorded in the class of 20 cm, so there is no number in the leaf row. How to Make and Use a Stem and Leaf Plot C) it enables us to examine the data values for the presence of trends, cycles, and, D) it enables us to locate the centre of the data, see the overall shape. Stem-and-leaf plot graphs are usually used when there are large amounts of numbers to analyze. TheXsclvalue determines the bin width. We could start by making a stem-and-leaf plot of our data. The action you just performed triggered the security solution. The Stem and Leaf plot is a way of organizing data into a form that makes it easy to see the frequency of different values. If you have data that is jumping all over the place in the Tens place, I would definitely use a Stem and Leaf plot. Rowena made a survey of the ages of passengers in a train carriage, and collected the results in a frequency table. Direct link to louisaandgreta's post Can you do stem and leaf , Posted 6 years ago. k = 2, 95.44% will lie within m + 2u Display the results as a histogram. ((20-200)^2+(300-200)^2)/2, The normal distribution is symmetric and is also known as the bell-shaped curve. Is there a way to output a stem and leaf plot to a graphical device, such as window() / quartz()? Summary. And you see the distribution The range of the distribution is greater than the double IQR. Direct link to Mackenzie Frazee's post how do you get your answe, start color #11accd, 1, end color #11accd, vertical bar, 7, start color #11accd, 1, end color #11accd, vertical bar, 8, start color #11accd, 2, end color #11accd, vertical bar, 0, start color #11accd, 2, end color #11accd, vertical bar, 5, start color #11accd, 2, end color #11accd, vertical bar, 8, start color #11accd, 3, end color #11accd, vertical bar, 4, start color #11accd, 3, end color #11accd, vertical bar, 7, start color #11accd, 3, end color #11accd, vertical bar, 8, start color #11accd, 5, end color #11accd, vertical bar, 0, start color #11accd, start text, s, t, e, m, s, end text, end color #11accd, start color #1fab54, start text, l, e, a, v, e, s, end text, end color #1fab54, 1, vertical bar, start color #1fab54, 7, end color #1fab54, 1, vertical bar, start color #1fab54, 8, end color #1fab54, 2, vertical bar, start color #1fab54, 0, end color #1fab54, 2, vertical bar, start color #1fab54, 5, end color #1fab54, 2, vertical bar, start color #1fab54, 8, end color #1fab54, 3, vertical bar, start color #1fab54, 4, end color #1fab54, 3, vertical bar, start color #1fab54, 7, end color #1fab54, 3, vertical bar, start color #1fab54, 8, end color #1fab54, 5, vertical bar, start color #1fab54, 0, end color #1fab54. Stem and Leaf Plots. columns: A stem-and-leaf plot resembles a histogram on its side. The Stem and Leaf plot is a concept in mathematics that makes it more fun. I. This assay . The results might look like this: 1, 4, 2, 1, 0, 2, 1, 0, 1, 2, 1, 0, 0, 2, 2, 3, 1, 1, 3, 6. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Variation is the "spread" of data points about the center of the distribution in a sample. The following unordered data represents the ages of passengers on a train carriage. Are they skewed, sharply peaked, flat, bimodal. We will first create the stem-and-leaf plot, and then we will organize the values of the leaves. Look again at the example of the algebra students and their siblings. This page titled 2.8.2: Stem-and-Leaf Plots and Histograms is shared under a CC BY-NC license and was authored, remixed, and/or curated by CK-12 Foundation via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.
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