For the hypothesis tests, specify

(i) Null and alternative hypotheses,

(ii) Form of the test statistic,

(iii) Make the decision about rejecting or not rejecting H0.

For the CIs, provide a lower and upper bound

17. (12 points) Woo and Mckenna investigated the effect of broadband ultraviolet B (UVB) therapy and topical calcipotriol cream used together on areas of psoriasis. One of the outcome variables is the Psoriasis Area and Severity Index (PASI). The following table gives the PASI scores for 20 subjects measured at baseline and after eight treatments. Do these data provide sufficient evidence, at the 0.01 level of significance, to indicate that the combination therapy reduces PASI scores?\f