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15. Test the claim below about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random and dependent, and the populations are normally distributed. Claim: Hy =0; a =0.01. Sample statistics: d = 3.5, 3d = 8.61, n= 7 Identify the null and alternative hypotheses. Choose the correct answer below. O A. Hgilly 20 O B. HD: He =0 Ha: Hd # 0 O C. HD: Hg 0 Hy : Hu >0 The test statistic is t= (Round to two decimal places as needed.) The critical value(s) is(are) to = (Round to two decimal places as needed. Use a corrima to separate answers as needed.) Since the test statistic is (1) the rejection region, (2) the null hypothesis. There (3) statistically significant evidence to reject the claim. (1) O in (2) O reject (3) O is not O not in O fail to reject is