Ap statistics question? (this was on a quiz i had last week, and i'm really confused on how to do it.)

a teacher is wondering if 1st period students tend to do better on tests than 2nd period students. she takes a random sample of 5 1st period students whose scores were 98, 86, 75, 92, and 90. she takes a random sample of 3 2nd period students whose scores were 91, 89, and 87.

suppose that the original distributions of scores are normally distributed. do these data give evidence that the 1st period students do better?

perform the appropriate hypothesis test. show all work.

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

Choose the linear inequality that describes the graph. the gray area represents the shaded region. a: y ≤ –4x – 2 b: y > –4x – 2 c: y ≥ –4x – 2 d: y < 4x – 2

Can someone explain to me how to do