Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows: # of movies      Frequency 0                       5 1                       9 2                       6 3                      4 4                      1 Table 2.83 a. Find the sample mean x

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


# of movies      Frequency
0                       5
1                       9
2                       6
3                      4
4                      1
Table 2.83


a. Find the sample mean x
¯
.
b. Find the approximate sample standard deviation, s

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