![cplot leaf stem graphing calculator cplot leaf stem graphing calculator](https://image.slidesharecdn.com/determiningalineofbestfit-140329171222-phpapp02/95/determining-a-line-of-best-fit-using-a-graphing-calculator-4-638.jpg)
- Cplot leaf stem graphing calculator software#
- Cplot leaf stem graphing calculator code#
- Cplot leaf stem graphing calculator download#
The distribution of the continuous variable write, which is the scores ofĢ00 high school students on a writing test.
Cplot leaf stem graphing calculator code#
Have you become a stem and leaf plot devotee? I like how they present the same distribution properties as histograms, but you can also pull out some or all of the data values.Below is an example of code used to investigate the distribution of a By reading the counts on this stem and leaf plot, we know that the majority of the values are between 22 and 29. Where do most values fall? Higher counts correspond to more frequently occurring data values. The purpose behind this funny way of counting is to present a kind of distribution density. This count indicates there are 43 observations in that row and higher (towards the right tail). On the higher side of the median, the stem = 2 row with values of 8 and 9 has a count of 43. This number indicates there are 39 observations in this row and lower (towards the left tail). For each row, the counts sum that row and all rows further away from the median out to the distribution’s tail.įor example, the stem = 2 row with the leaf values of 4 and 5 has a count of 39.
![cplot leaf stem graphing calculator cplot leaf stem graphing calculator](http://faculty.capebretonu.ca/~erudiuk/math135/minitab/Chapter2_files/Image7.gif)
Reading these counts in a stem and leaf plot might not be intuitive at first. The first column contains cumulative counts. For these data, we know the median is either 26 or 27.
Cplot leaf stem graphing calculator software#
This software indicates where the median occurs by placing parentheses around the count. Medianįor stem and leaf plots, statistical software often highlights the median in some fashion. In these rows, the minimum data point is 16 and the maximum is 46. In our graph, 1 and 4 are the extreme stem values, and they both have fewer rows than the middle values (2 and 3). Consequently, the extreme stem values can have fewer rows than the other stem values. Each row contains only two leaf values (e.g., 0 and 1, 2 and 3, etc.) The leaf values stop at the minimum and maximum values of the dataset. There are two 1s, five 2s, five 3s, and four 4s.įor the body fat percentage data, the graph divides stem values into five rows. Statistical software packages use an algorithm to improve our ability to read stem and leaf plots by using multiple rows of each stem value based on the data’s properties, which is the case with the body fat percentage graph. Using this information, you can determine the value of every data point on this graph! Multiple Stem Rows
![cplot leaf stem graphing calculator cplot leaf stem graphing calculator](https://i.ytimg.com/vi/FcpxEi5bS4Y/maxresdefault.jpg)
Therefore, we can read the stem values of 1, 2, 3, and 4 as corresponding to 10, 20, 30, and 40. This unit depends on how you or your software rounds the data.īecause the leaf unit is 1, we know the stem values must start in the 10s place. Or, if it had been 0.1, leaves would represent 0.1, 0.2, and so on. If the unit had been 10, the leaves would’ve been 10, 20, 30, etc. That’s simple because a leaf of 1 = 1, 2 = 2, and so on. This stem and leaf plot uses a leaf unit, but others have a key, which provides similar information. The leaf unit or key allows us to read the value of each leaf. Related post: Skewed Distributions Leaf Unit or Key Let’s look at some of the other features because they’ll allow us to draw additional conclusions.
Cplot leaf stem graphing calculator download#
You can download the dataset yourself: body_fat.Īt first glance, you can see that there are 92 observations, the data are right-skewed, and the peak occurs at 22/23. I often use this dataset to illustrate a right-skewed, nonnormal distribution. The stem and leaf plot below displays the body fat percentage values I obtained during a study.