solve........

Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying 33 stores, which yielded a sample mean of $84 and a sample standard deviation of $14, test the claim at the 5% level that the standard deviation is greater than $15. Part (a) State the null hypothesis. O Ho: 0 2 152 O Ho: 0 2 s 152 Part (b) State the alternative hypothesis. O Ha: 0 2 # 152 O Ha: 0 2 2 152 O Ha: 02> 152 O Ha: 0 2