Frequency Tables Frequency Table Review A frequency table
Frequency Tables
Frequency Table (Review) • A frequency table shows how often and item, a number, or range occurs. • Could be used when counting responses, or to group data into intervals. Mathis. Fun. Com- Organizing and Comparing Data; Math on Call p. 262 -313
Computer Used for Frequency Exploring Gaming Homework Social Media Other (itunes, watching tv shows, etc. ) Draw this table in your notes. Keep tally as your classmates vote in the frequency column. 1. For your class, what do most students use the computer for? 2. For your class, what was the least popular reason for using the computer? 3. If I were to use this frequency table to create a graph, which would be most appropriate to use?
Stem-and-Leaf
Stem-and-Leaf (Review) • Stem-and-leaf allow you to easily see the least, greatest and median values in a set of data. Mathis. Fun. Com- Organizing and Comparing Data; Math on Call p. 262 -313
How to create/read a stem-and-leaf plot… It is a table that is broken into leafs (the last digit) and stems (usually all remaining digits). Complete a stem-and-leaf plot for the following list of grades on a recent test: 73, 42, 67, 78, 99, 84, 91, 82, 86, 94 1. Identify the least and greatest values. Calculate the range of the data set. 2. What is the median of the data set?
Solution Stem 4 6 7 8 9 Leaf 2 7 3, 8 2, 4, 6 1, 4, 9 1. Lowest Value: 42; Greatest Value: 99; Range: 99 -42=57 2. Median: 10 Values total (will have two values in the middle of data set) Two Middle Values: 82 & 84; 82+84=166 166/2= 83
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