(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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orchestra answered 1 year ago

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