Question

For the scenarios answer the following:

a. State the independent (or quasi-independent) variable

b. State the dependent variable

c. Should the alternative hypothesis be one-tailed or two-tailed? Explain why.

d. State the null hypothesis

e. State the appropriate alternative hypothesis.

Scenarios1)  A researcher is interested in determining if there is a difference in the amount of time college students spend texting during class depending on where they sit in a classroom. He video tapes three different classrooms on campus and records the amount of time students in the front (first two rows), students in the middle (middle two rows) and students in the back (last two rows) of the classroom spend texting during the 45-minute lecture.

Scenario2) Ms. Nosienelly believes that adults will make more voice calls on their cell phone in public than adolescents will. To test her idea she asks a group of 100 fifteen-year-olds and a group of 100 forty-five-year-olds how many times a day they make a voice call on their cell phone while they are in public.

Scenario3) A university professor wanted to know if the way students were tested made a difference in their grades. One class took all their exams on a computer while a second class took all their exams on paper. The exact same exams were used for both groups. The grades on the exams were compared to see which group performed better

Answer 1