1. At-testis a type of inferential statistic used to determine if there is a significant difference between the means of two groups.

Group of answer choices

True

False

2. Histograms are one way to turn a bivariate analysis into a visual form.

Group of answer choices

True

False

3. Which of the following is NOT an accurate description of sampling error?

Group of answer choices

It decreases as the sample size increases

It is the sampling statistic of interest

It describes the difference between the sample estimates and their true population values

It occurs by random chance

4. A researcher is interested in seeing whether her new migraine treatment works as predicted. She conducts an experiment with randomly assigned treatment and control conditions, and wants to assess the difference in means between the two groups. The most appropriate test for her to use is:

Group of answer choices

A t-test

A multivariate regression

A regression to the mean

A regression discontinuity

5. Anscombe's Quartet shows us that understanding relationships based on the r-squared number (between -1 and +1) alone is tricky.

Group of answer choices

True

False