12. Measures of Center, Variation, and Position
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Mean: 5 students
Median: 4 students
Mode: 3 students
Range: 10 students
Before we can find the mean, median, mode, and range for the number of students who helped at the cookie booth each hour, we need to rearrange the numbers in the data set from least to greatest. 1, 3, 3, 4, 5, 8, 11 Now, let's find each value one at a time.
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Calculate quotient
The median is the value found directly in the middle of a data set. Here we can see that the value in the middle is 4. 1, 3, 3, 4, 5, 8, 11 The median number of students who helped at the booth is 4.
The mode of a data set is the value or values that occur most often. In this case, it is 3. 1, 3, 3, 4, 5, 8, 11 The mode of the number of students who helped at the booth is 3.
The range is the difference between the largest and smallest values. The largest number of students was 11 and the smallest number of students was 1. 11-1=10 Therefore, the range of the number of students is 10.