Question:A new drug is being tested to see if it can raise the frequency of migraines. Study participants were divided into two groups. 42 participants in group 1 received the medication; 31 participants in group 2 received a placebo. After a period of six months, group 1 had a mean of 4.5 migraines. It is known that the population standard deviation for this group is 1.1 migraines. Group 2 had a mean of 3.2 migraines. The population standard deviation for this group is 1.7 migraines . Can we conclude that the medication raises the population mean number of migraines ? Use alpha a = 0.04 . Note: If t-test, then unequal variances are assumed .

(Step 3) State the rejection region: i) Select from the dropdown menu to shade to the left, to the right, between or left and right of the critical value(s); and then shade the rejection region(s). The arrow can only drag to the critical value(s) that is/are rounded to one decimal place (these values correspond to the tick marks on the horizontal axis). Shade: Left of a value v. Click and drag the arrows to adjust the values. - 2 -I 0 -1.5 ii) Reject Ho if test statistic value [? v the critical value(s). (Select > if between two CV.) (Step 4) Calculate the test statistic: i) Calculate the standard error which corresponds to the denominator of the test statistic (show 6 decimal places): ii) Calculate the test statistic (rounded to 2 decimal places for z or 3 decimal places for t): ? v test statistic =