Construct a bar graph of the obesity rates of those eight states. Use a random number generator to randomly pick eight states.Bar graphs are especially useful when categorical data is being used. Some bar graphs present bars clustered in groups of more than one (grouped bar graphs), and others show the bars divided into subparts to show cumulative effect (stacked bar graphs). One axis of the chart shows the specific categories being compared, and the other axis represents a discrete value. A bar graph is a chart that uses either horizontal or vertical bars to show comparisons among categories. That is, finding a general pattern in data sets including temperature, sales, employment, company profit or cost over a period of time. These graphs are useful for finding trends. A line graph is often used to represent a set of data values in which a quantity varies with time. The advantage in a stem-and-leaf plot is that all values are listed, unlike a histogram, which gives classes of data values. In a stem-and-leaf plot, all data values within a class are visible. Presidential Ages at Inauguration PresidentĪ stem-and-leaf plot is a way to plot data and look at the distribution. You should now be able to create a stem and leaf plot within SPSS.8 7 7 7 7 6 6 6 5 5 5 5 4 4 4 4 4 2 1 1 1 1 1 0 Alternatively, check out our tutorial on exporting SPSS output to other applications such as Word, Excel, or PDF. ![]() If you want to save your stem and leaf plot, you can right-click on it within the Output Viewer in SPSS, and copy it to use in other programs. Since each leaf represents 1 case, we know that 7899 in the leaf column after the stem of 5 represents final exam scores of 57, 58, 59 and 59. In this example, the stem width of 10 means that the 5 in the stem column represents 50 (that is, 5 multiplied by 10), 6 represents 60 (6 multiplied by 10), and so on. Note that SPSS displays the “stem width” together with the number of cases that each leaf represents. The SPSS Output Viewer will pop up with the stem and leaf plot that you’ve created. Under “Display,” select “Plots” if you only want to generate a stem and leaf plot (without any accompanying statistics). Make sure that the “Stem-and-leaf” option is selected under “Descriptive.” Then select “None” under “Boxplots” and click the “Continue” button to return to the “Explore” dialog box below. This will bring up the “Explorer: Plots” dialog box illustrated below: Select the variable for which you wish to create a stem and leaf plot (“Statistics Final Exam Score” in this example), then use the arrow button to move it into the “Dependent List” box (as illustrated above). It is a good idea to click the “Reset” button to clear any previous settings. This brings up the “Explore” dialog box illustrated below: Select Analyze -> Descriptive Statistics -> Explore as illustrated below: Doing this will allow us to visualize the distribution of the scores while preserving information about the individual scores. We want to create a stem and leaf plot of these scores. This data set contains the hypothetical final exam scores of 40 students in a Statistics course (first 21 records displayed). (Check out our tutorials on importing data from Excel or MySQL into SPSS).
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