CSP Quantitative Research & Statistics 3

Question 1

Which sampling method involves dividing a population into subgroups and randomly selecting from each subgroup proportionally?

Accepted Answer

Stratified random sampling

Answer

Stratified random sampling divides the population into strata (subgroups) and draws random samples from each stratum, ensuring representation of all subgroups.

Question 2

A Type II error in hypothesis testing occurs when a researcher:

Accepted Answer

Fails to reject a false null hypothesis

Answer

A Type II error (false negative) occurs when the null hypothesis is actually false but the researcher fails to reject it, missing a real effect.

Question 3

In regression analysis, multicollinearity refers to:

Accepted Answer

High correlations among independent variables

Answer

Multicollinearity occurs when two or more independent variables in a regression model are highly correlated, making it difficult to isolate each variable's unique effect.

Question 4

A z-score of -2.0 indicates that the observation is:

Accepted Answer

Two standard deviations below the mean

Answer

A z-score of -2.0 means the observation lies two standard deviations below the mean of its distribution.

Question 5

Which statistical test is most appropriate to compare the means of three or more independent groups?

Accepted Answer

One-way ANOVA

Answer

One-way ANOVA (Analysis of Variance) is designed to compare means across three or more independent groups while controlling the overall Type I error rate.

(CSP) Certified Sociological Practitioner Practice Test

(CSP) Certified Sociological Practitioner Practice Test

CSP Quantitative Research & Statistics 3