PSYC 201 Exam Questions with Correct Answers Latest Update 2026/2027
What type of data is used in chi-square? - Answers nominal variables
How do you calculate df for correlation? - Answers n-2
What is the purpose for post hoc tests? - Answers to uncover specific differences between two
or more groups
What is the difference between regression and correlation? - Answers statistic cannot/can go
negative, has f statistic vs Pearson's r statistic, ...
Draw conclusions about how a sample generalizes to the population. - Answers inferential
statistics: t-tests, ANOVA, regression, pi square, ...
What is the difference between factorial vs one-way ANOVA? - Answers 1 independent variable
vs more than 1 independent variable
Why would you use ANOVA instead of multiple t-tests? - Answers to reduce type 1 error
What are the two parts of regression? - Answers to calculate the line of the best fit and model fit
What is the correlation coefficient for stress and sleep, r = -.75? - Answers when stress is high,
sleep is low
when stress is low, sleep is high
What does O & E stand for in a chi square equation? - Answers observed and expected
- both frequencies/values
What is an example of chi square goodness of fit test? - Answers testing political affiliations
(republican, democratic, ...)
What is the difference between practical significance and statistical significance? - Answers
calculation for effect size
shows if the effect is large enough to be meaningful
What is the test used for model fit (regression) and critical value? - Answers f-statistic (use an f
distribution table)
Label the regression equation line. - Answers a: y-intercept (what y will be when x is 0)
b: slope (what x will be by each unit increase)
What are 2 requirements for calculating a Pearson's r correlation coefficient? - Answers 2
quantitative numeric variables
What type of data is used in chi-square? - Answers nominal variables
How do you calculate df for correlation? - Answers n-2
What is the purpose for post hoc tests? - Answers to uncover specific differences between two
or more groups
What is the difference between regression and correlation? - Answers statistic cannot/can go
negative, has f statistic vs Pearson's r statistic, ...
Draw conclusions about how a sample generalizes to the population. - Answers inferential
statistics: t-tests, ANOVA, regression, pi square, ...
What is the difference between factorial vs one-way ANOVA? - Answers 1 independent variable
vs more than 1 independent variable
Why would you use ANOVA instead of multiple t-tests? - Answers to reduce type 1 error
What are the two parts of regression? - Answers to calculate the line of the best fit and model fit
What is the correlation coefficient for stress and sleep, r = -.75? - Answers when stress is high,
sleep is low
when stress is low, sleep is high
What does O & E stand for in a chi square equation? - Answers observed and expected
- both frequencies/values
What is an example of chi square goodness of fit test? - Answers testing political affiliations
(republican, democratic, ...)
What is the difference between practical significance and statistical significance? - Answers
calculation for effect size
shows if the effect is large enough to be meaningful
What is the test used for model fit (regression) and critical value? - Answers f-statistic (use an f
distribution table)
Label the regression equation line. - Answers a: y-intercept (what y will be when x is 0)
b: slope (what x will be by each unit increase)
What are 2 requirements for calculating a Pearson's r correlation coefficient? - Answers 2
quantitative numeric variables
