Question

A typical person has a score of 6.2, a sample average is 7.46, and the sample...

A typical person has a score of 6.2, a sample average is 7.46, and the sample standard deviation to be 2.57. At a 0.05 significance level is the sample useful?

Scores
13
6
12
5
7
8
10
8
9
10
9
4
4
5
3
8
8
7
6
3
9
9
9
10
11
12
8
5
6
8
7
5
5
4
8
8
3
9
9
10
6
Math   Statistics-And-Probability   
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