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 .

Question b) i) Whichtype of error could have been made in your conclusion above? J Select an answar 1.. Type 1 Error Type II Error a . , . _ None of the above. In that situation. 0 I could be a mistake not to reject the null hypothesis when the medication actually raises the participants' mean number of migraines. 0 It could be a mistake not to- reiect the null hypothesis when the medication actually reduces or has no effect. on the population mean number of migraines. 0 It could be a mistake not to reject the null hypothesis when the medication ' actually raises the population mean number of migraines. ' ; 0 it could be a mistake to reiect the null- hypothesis when the medication actually reduces or has no effect on the participants' mean number of migraines. 0 it could be a mistake to reject the null hypothesis when the medication actually raises the population mean number of migraines\" 0 It could be a mistake to reject the null hypothesis when the medication actually reduces or has no effect on the population mean number of migraines