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2.7 Exercise 30

Avg difficulty 2.5

Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows:

Number of Movies Frequency
0 5
1 9
2 6
3 4
4 1
  1. Find the sample mean x .
  2. Find the approximate sample standard deviation, s.

OpenStax Statistics, 2.7 Measures of the Spread of the Data, exercise 30

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