Question

To study the effect of classical music on concentration, 26 math majors were assigned at random into two groups. Subjects in one group listened to classical music while trying to solve a hard Sudoku puzzle, while the subjects in the other group solved the same puzzle in a silent room. The time it took each student to finish was recorded.

1. This is a study which is...

a. blinded.

b. matched pairs.

c. both blinded and matched pairs.

d. blinded only

e. matched pairs only.

f.neither

2. The explanatory variable in this study is...

a.qualitative

b. quantitative

3. The response variable in this study is....

a. qualitative.

b.quantitative

Answer #1

1.

Correct option:

**f. neither**

Explanation:

In this experimentation the 2 samples are independent. So, it is not matched pairs. Both the participant as well as the researcher know which participant goes to which group. So, it is not blinded.

2.

Correct option:

**a.qualitative**

Explanation:

The explanatory variable is classical music. So, it is
qualitative.

3.

Correct option:

**b.quantitative**

Explanation:

The response variable is time. So, it is quantitative.

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