Question

1. Which of the following tests would you use to explore the relationship between two ordinal variables?

a. Phi correlation

b. Pearson’s product-moment correlation

c. Spearman's rank-order correlation

d. Point-biserial correlation

2. Thirty people took part in a study to see the extent to which musical ability is related to math proficiency. The researchers observed each each subject as they played piano and scored their proficiency with piano. Subjects also took a math test. Two sets of scores were then analyzed to determine if the two skills were related. Which of the following research designs was used in the study?

a. Non-experimental study.

b. [Controlled] experimental study.

c. [Controlled] experimental study using self-reported data

d. Non-experimental study using self-reported data.

3. If there is a moderate positive and statistically significant relationship between hours spent attending lectures and final course grade, you may conclude that

a. students who attend more lectures tend to have higher grades.

b. spending more time attending lectures will lead to improvement in the final course grade.

c. the final grade cannot be accurately predicted from the number of hours students attend lectures.

  

Answer 1

Ans:

1)Correct option is:

Spearman's rank-order correlation

(is a nonparametric measure of the strength and direction of association which exists between two variables measured on an ordinal scale.)

2)

Correct option is:

Non-experimental study

(as no treatments are used to modify the response)

3)

Option a is correct.

students who attend more lectures tend to have higher grades.