Question

In: Statistics and Probability

(a) A study of 4-year college graduates showed that the average graduate had 132 credit hours....

(a)

A study of 4-year college graduates showed that the average graduate had 132 credit hours. The following 6 samples of credit hours were recorded from Maryland college's students concerning their credit hours upon graduation:

                                      137, 135, 151, 122, 131, 141

i.

Calculate the sample mean and sample standard deviation.

ii.

Construct a 95% confidence interval for the population mean number of credit hours for 4-year graduates                                                                                                         

iii.

Is there significant evidence to suggest that the average number of credit hours for 4-year graduates is different from 132 credit hours? Test at the 1% significance level.

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Expert Solution

orchestra answered 1 year ago
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