Dr.Johns is studying the effects of caffeine on memory.After comparing the subjects taking a placebo with those taking caffeine pills he concludes that caffeine enhances memory.He most likely used _____ to determine the difference between groups.
A)descriptive statistics
B)inferential statistics
C)probabilities of test scores
D)none of these

Question

Quizplus · Accepted Answer

Inferential statistics are used to determine if there is a statistically significant difference between groups, which would be appropriate for Dr. Johns' study comparing the effects of caffeine on memory between the placebo and caffeine pill groups. Descriptive statistics would only provide information about the characteristics of each group, while probabilities of test scores are not a statistical method used to compare groups.

DrJohns Is Studying the Effects of Caffeine on Memory