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Math Review: mean, median, mode, range. Average Number of Emails. x x x x x x x___x___x_____x__________ 1 2 3 4 5 6 Emails sent today What is the average number of emails sent today? Remember to find the average : ADD and Divide What is the range?
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Average Number of Emails • xx x x x x x___x___x_____x__________1 2 3 4 5 6Emails sent today • What is the average number of emails sent today? • Remember to find the average : ADD and Divide • What is the range? • What is the mode? • What is the median?
What is the mean? • The mean is the average. It is found by adding all the numbers in a set and dividing by the number of values. • 10, 25, 20, 5, 20 • The sum is 75. • We added 5 numbers. • Divide 75 by 5. • The average or mean is 15.
What is the Median? • The median is the middle number when the data are listed in order. • The number of raisins in our boxes: • 10, 26, 26, 27, 30, 32, 32, 32, 34 • x • 30 is the median.
What is the mode? • The mode is the number or numbers that occur most often in the data. • 10, 26, 26, 27, 30, 32, 32, 32, 34 • The mode is 32.
What is the range? • The range is the difference between the greatest and the least number in the data. • 10, 26, 26, 27, 30, 32, 32, 32, 34 • The greatest number is 34. The least number is 10. • 34 – 10 = 24. The range is 24.