CRS Quantitative Research Methods 3

Question 1

Which type of validity refers to the degree to which a test measures what it is theoretically supposed to measure?

Accepted Answer

Construct validity

Answer

Construct validity assesses whether an instrument actually measures the underlying theoretical construct it is designed to measure.

Question 2

A researcher uses every 10th person on a list as a sample. This is an example of:

Accepted Answer

Systematic sampling

Answer

Systematic sampling selects every kth element from a list, providing an efficient alternative to simple random sampling.

Question 3

Cronbach's alpha is a measure of:

Accepted Answer

Internal consistency reliability

Answer

Cronbach's alpha quantifies the internal consistency of a scale by measuring how closely related a set of items are as a group.

Question 4

When a researcher incorrectly fails to reject a false null hypothesis, this is known as a:

Accepted Answer

Type II error

Answer

A Type II error (beta error) occurs when the null hypothesis is not rejected even though it is actually false.

Question 5

Which statistical technique is used to reduce a large number of correlated variables into a smaller set of uncorrelated components?

Accepted Answer

Principal component analysis

Answer

Principal component analysis (PCA) transforms correlated variables into orthogonal components that capture maximum variance.

(CRS) Certified Research Specialist Practice Test