FREE Psychology Degree Research Methods Statistics Questions and Answers

Question 1

A researcher conducts an experiment to determine if a new therapy reduces anxiety levels.
They randomly assign participants to either the therapy group or a control group.
After the intervention, anxiety levels are measured using a standardized scale.
Which statistical test would be most appropriate to compare the mean anxiety levels between the two groups?

Accepted Answer

Independent samples t-test

Answer

Paired samples t-test

Answer

ANOVA

Answer

Chi-square test

Question 2

Which of the following describes a Type I error in hypothesis testing?

Accepted Answer

Rejecting a true null hypothesis

Answer

Failing to reject a false null hypothesis

Answer

Failing to reject a true null hypothesis

Answer

Rejecting a false null hypothesis

Question 3

A study investigates the relationship between hours of sleep and academic performance. The researcher finds a correlation coefficient (r) of -0.75. What does this value indicate about the relationship between these two variables?

Accepted Answer

A strong negative relationship

Answer

A strong positive relationship

Answer

A weak negative relationship

Answer

No linear relationship

Question 4

Before conducting inferential statistics, a researcher often checks assumptions about their data. Which assumption is crucial for parametric tests like t-tests and ANOVA, assuming interval or ratio data?

Accepted Answer

Normality of data distribution

Answer

Ordinal scale of measurement

Answer

Nominal scale of measurement

Answer

Presence of outliers in all groups

Question 5

A psychologist is interested in whether there is an association between a person's preferred learning style (visual, auditory, kinesthetic) and their choice of undergraduate major (Arts, Sciences, Business). Which statistical test would be most appropriate to analyze this relationship?

Accepted Answer

Chi-square test of independence

Answer

Pearson correlation

Answer

Independent samples t-test

Answer

ANOVA

Question 6

In a regression analysis, what does the coefficient of determination (R-squared) represent?

Accepted Answer

The proportion of variance in the dependent variable that is predictable from the independent variable(s).

Answer

The strength and direction of the linear relationship between two variables.

Answer

The average distance of data points from the regression line.

Answer

The probability of making a Type I error.