The claim is a mean is 252 and you want to prove it is not equal. Test the hypothesis within a 5% level of significance. Your sample of 78 had a mean of 236.88 and standard deviation of 57.96. Level of difficulty = 3 of 3 Please format to 2 decimal places.

Number of Tails:	One-tail Two-tail
Test Statistic:
Critical z in the Decision Rule:	Both + and
Reject or Not:	Reject null hypothesis Do not reject null hypothesis