Question

#3. In the following studies, state whether you would use a one-sample t test or a two-independent-sample t test.

A. A study testing whether night-shift workers sleep the recommended 8 hours per day

B. A study measuring differences in attitudes about morality among Democrats and Republicans

C. An experiment measuring differences in brain activity among rats placed on either a continuous or an intermittent reward schedule

PLEASE EXPLAIN MORE CLEARLY. THANK YOU!

Answer 1

A. A study testing whether night-shift workers sleep the recommended 8 hours per day

Answer:

one-sample t test

Explanation: For the given scenario, there is only one sample of night-shift workers and we have to test for average population sleep time per day.

B. A study measuring differences in attitudes about morality among Democrats and Republicans

Answer:

two-independent-sample t test.

Explanation: For the given scenario, we are given two samples such as attitudes about morality among Democrats and attitudes about morality among Republicans. Here, two samples are independent and we have to test for the difference between the average attitudes for these two samples.

C. An experiment measuring differences in brain activity among rats placed on either a continuous or an intermittent reward schedule

Answer:

two-independent-sample t test.

Explanation: Here, we are given two independent samples such as the brain activity among rats placed on a continuous reward schedule and intermittent reward schedule. Both samples are independent and we have to use this t test for checking significant difference in the average brain activities for these two populations of samples.