Identify the key elements. For each of the following

Chapter , Problem 8.52

(choose chapter or problem)

Identify the key elements. For each of the following scenarios, identify the populations, the counts, and the sample sizes; compute the two proportions and find their difference. (a) Two website designs are being compared. Fifty students have agreed to be subjects for the study, and they are randomly assigned to visit one or the other of the websites for as long as they like. For each student the study directors record whether or not the visit lasts for more than a minute. For the first design, 12 students visited for more than a minute; for the second, 5 visited for more than a minute. (b) Samples of first-year students and fourth-year students were asked if they were in favor of a new proposed core curriculum. Among the first-year students, 85 said Yes and 276 said No. For the fourth-year students, 117 said Yes and 104 said No.