Author Question: In research studies, the term effect size refers to a. how much each treated and untreated person ... (Read 52 times)

biggirl4568 · **on:** Jun 22, 2018

In research studies, the term effect size refers to

a. how much each treated and untreated person in the study changes.
b. the power of the statistical tests that are used to detect the impact of the independent variable.
c. how many subjects are included in a particular study.
d. the degree of external validity that the study has.

Question 2

A researcher studying the effect of a dietary supplement on sleep finds that research participants who take the supplement sleep an average of 7 hours and 25 minutes per night, while participants who were given a placebo pill with no active ingredients in it sleep for an average of 7 hours and 20 minutes. These findings are likely

a. statistically significant.
b. clinically insignificant.
c. Statistically insignificant.
d. clinically significant.