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 a= 0.04. Note: If t-test, then unequal variances are assumed. Question a) Let: #1 = the population mean number of migraines with the medication U2 = the population mean number of migraines with the placebo (Step 1) State the null and alternative hypotheses, and identify which tailed test: Ho: H1 ?v /2 H1: /1 2v M2 Which tailed test you need to perform? O two-tailed test O right-tailed test O left-tailed test