Stem and leaf plot examples
Stem and Leaf Plot
Stem and Leaf Plots in Statisticsand
The tens digits would be the "stems", and the ones digits would be the "leaves". The smallest tens digit is 2 , and the greatest is 4 ; write them in vertically on the left. Then, for each stem, write the leaves in increasing order on the right:. Note that there are two 5 's in the second row, since there are two 35 's in the data set. Make a stem-and-leaf plot for the data set below. Use it to find the median, mode, and range of the data set. Note that in this case, the data set is already in order from least to greatest.
Tutorial on how to read and interpret stem and leaf diagrams with examples and solutions. Example 1: The stem and leaf plot below shows the grade point averages of 18 students. The digit in the stem represents the ones and the digit in the leaf represents the tenths. Solution to Example Example 2: The back to back stem and leaf plot below shows the exam grades out of of two sections. The digit in the stem represents the tens and the digit in the leaf represents the ones.
A stem and leaf display is a graphical method of displaying data. It is particularly useful when your data are not too numerous. In this section, we will explain how to construct and interpret this kind of graph. As usual, an example will get us started. Consider Table 1 that shows the number of touchdown passes TD passes thrown by each of the 31 teams in the National Football League in the season. A stem and leaf display of the data is shown in Figure 1. The left portion of Figure 1 contains the stems.
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 Bowl 's work in the early s, and are useful tools in exploratory data analysis. Stemplots became more commonly used in the s after the publication of John Tukey 's book on exploratory data analysis in Modern computers' superior graphic capabilities have meant these techniques are less often used. A stem-and-leaf display is also called a stemplot , but the latter term often refers to another chart type. 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.
Intro Examples. The following examples provide some practice with stem-and-leaf plots, as well as explaining some details of formatting, and showing how to create a "key" for your plot. Stem-and-Leaf Plots. The first thing I'll do is reorder this list. It isn't required, but it surely makes life easier. My ordered list is:.
Measures of central tendency. How to find function values.
electric electronic eyebrow threading epilator face facial threader hair remover
Intro Examples. Stem-and-leaf plots are a method for showing the frequency with which certain classes of values occur. You could make a frequency distribution table or a histogram for the values, or you can use a stem-and-leaf plot and let the numbers themselves to show pretty much the same information. For instance, suppose you have the following list of values: 12, 13, 21, 27, 33, 34, 35, 37, 40, 40, You could make a frequency distribution table showing how many tens, twenties, thirties, and forties you have:. Stem-and-Leaf Plots.