![]() ![]() stems – the greatest place value of the data.stem-and-leaf plot – numerical data are listed in ascending or descending order.One way to organize and display data is through a stem-and-leaf plot.Now, it’s time to take notes… please copy the following slide. Name an advantage of displaying the data in groups.Is there an equal number of electors in each group? Explain.Please discuss the following questions with your group, and write your answers on the guide:.Organize the numbers in each group from least to greatest.Now, with your group, please write each number on individual pieces of scrap paper. The number of electors for each state, including the District of Columbia, is shown (Source: The World Almanac): The members of the Electoral College officially elect the President of the United States. To rescale the plot we need to use the scale argument inside the stem() function.12-1 Stem-and-Leaf Plots How can stem-and leaf plots help you understand an election? Now let’s see the same stem and leaf plot after rescaling our desired plot. For better readability the numbers having same stem value are merged together. The left side shows the most significant digit while the last digit is shown on the right hand side. ![]() The stem() command extracts the numeric data and splits them into two parts namely, the stem and leaf. Here $ sign is used in the command to extract the data from the list used. Syntax: stem(number, scale = 1, width = 80, atom = 1e-08) Parameters: number: the data on which we want to draw the stem and leaf plot scale: the scale we want to use for our plot width: the desired width for our plot atom: tolerance Then 9 will be the stem and 4 will be the leaf. ![]() For example, suppose the input data is 94. ![]() The term stem and leaf is so because the plot is given in a tabular format where each numeric value or data item is split into a stem i.e. In R, stem and leaf plots(also known as stem and leaf diagrams) of any quantitative variable, say x, is a textual graph that is used to classify the data items in order of their most significant numeric digits. In case of infinite values or missing values of the number, they are discarded. In order to increase readability sometimes, the alternate rows can be merged with it’s immediate next row. The stem is the left side of the chart while the right side is the leaf. Here the records are arranged based on their most significant digit.
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