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: Hd 20; a = 0.05. Sample statistics: d = -2.2, So = 1.3, n = 17 Identify the null hypothesis by writing its complement. O A. Ho: Ha 20 OB. Ho: Ha = 0 Ha: Hd 0 OF. HO: Ha SO Ha: Ha SO Ha: Hd > 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 comma to separate answers as needed.) Since the test statistic is the rejection region, the null hypothesis. There statistically significant evidence to reject the claim