The mean is 7.7.
The range is 4.
The mode is 8.
The median is 8.
What are the measures of central tendency and variability?
Mean is the average of a set of numbers. It is determined by adding the numbers together and dividing it by the total number
Mean = sum of the numbers / total number
(5 + 6 + 6 + 7 + 7 + 7 + 7 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 9 + 9 + 9 + 9 + 9) / 20
154 / 20 = 7.7
Mode is the number that occurs the most in the data set. The mode is 8.
Range is the difference between the highest number and the lowest number in the data set.
Range = 9 - 5 = 4
Median is the number at the center of the data set. The median is 8.
To learn more about mean, please check: https://brainly.com/question/25842202
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