The following frequency distribution shows the ACT scores of a sample of student

Question

The following frequency distribution shows the ACT scores of a sample of students:

Score                                                                  Frequency
14 - 18                                                                       2
19 - 23                                                                       5
24 - 28                                                                      12
29 - 33                                                                       1

For the above data, compute the following.
a. The mean
b. The standard deviation

Explanation / Answer

mean =20/4 =5 SD=4.97

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