![]() 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. To create a stem and leaf plot: Click on QI Macros > Chart Templates > Stem and Leaf Plot to open the template: The template will open and contains some pre-populated sample data. That is, finding a general pattern in data sets including temperature, sales, employment, company profit or cost over a period of time. QI Macros installs a new menu on Excel's tool-bar. 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. The frequency points are connected using line segments.Ī stem-and-leaf plot is a way to plot data and look at the distribution. ![]() In the particular line graph shown in Example, the x-axis (horizontal axis) consists of data values and the y-axis (vertical axis) consists of frequency points. So we get to 102 points.\): Atlanta Hawks Wins and Losses Number of WinsĪnother type of graph that is useful for specific data values is a line graph. Might have messed- let me do that one more time. Then two 7's, then a 4 then a 2, and then these two charactersĭidn't score anything. Did I do that right? We have two 11's, then a 9, Start with the largest, so 20 plus 18 plus 13 plus 11 plusġ1- 13, 11, 11- plus 9 plus 7 plus 7 again plus 4 plus 2. How many scored betweenġ0 and 19 points, and then how many scoredĢ0 points or over. Scored between 0 and 9 points, including 9 points. Was useful about this, is you see how many players Stem-and-leaf plot, we were able to extract outĪll of the number of points that all of the players scored. You have this player that has the tens digit is a 2. And then we have thisĭo orange, this player has 3 in the ones place. ![]() The digits start with, or all of the points start withġ, for each of the players. And then, let me see, I'mĪlmost using all the colors, this player had 9įor his ones digit. Had a 2 in his ones digit, so he scored aĭo orange, this player had 4 for his ones digit. Try to do all the colors, this player also hadĪ 0 in his ones digit. So there's, let's see, 1,Ģ, 3, 4, 5, 6, 7 players had 0 as the first digit. You're a little bit more used to understanding it. Write down all of this data in a way that maybe Points to started with a 2, and it was actually 20 points. The players scored points that started with a 0. And usually the leaf willĬontain the rightmost digit, or the ones digit,Ībout this is it gives kind of a distribution In the number of points that each player scored. The leaf contains the smallest digit, or the ones digit, Player, actually scored? And the way to interpretĪ stem-and-leaf plot is the leafs contain-Īt least the way that this statistician used it. To the number of points each student, or each This plot right over here, it seems a little And sometimes it'sĭid the team score? And when you first look at Of points that each of the 12 players on the
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