Question

1. Does listening to music increase the average amount of time you study? Twenty people participate in an experiment to test the effects of music on studying. Half of the participants listen to no music first and then classical music. The other half listen to classical music first and then no music. The amount of time they study is recorded (in minutes) each time.

A 95% confidence interval of (-36.84, 60.56) is found. What conclusion can we make?

(No music - classical music)

Group of answer choices

a. We are 95% confident that the sample mean study time with no music is 36.84 less to 60.56 more than with classical music.

b. We are 95% confident that the sample mean study time with no music is 60.56 less to 36.84 more than with classical music.

c. We are 95% confident that the population mean study time with no music is 36.84 less to 60.56 more than with classical music.

d. We are 95% confident that the population mean study time with no music is 36.84 more to 60.56 more than with classical music.

2. A researcher is testing the effect of music on workplace productivity. She randomly samples 8 employees of a local accounting firm and records how long (in minutes) they work without logging a break without music, and then with music. When she is going over the data she notes that it looks normal. Which of the following assumptions are violated, if any?

Group of answer choices

a. None of the assumptions are violated

b. Paired Data Assumption

c. Nearly Normal Condition

d. Independence Assumption

Randomization Assumption

Answer 1