Author Question: A researcher begins a study with 250 subjects, and 50 subjects drop out before the study is ... (Read 66 times)

Hungry! · **on:** Jul 8, 2018

A researcher begins a study with 250 subjects, and 50 subjects drop out before the study is concluded. The researcher will declare 20 as the sample

a. acceptance rate.
b. attrition rate.
c. refusal rate.
d. retention rate.

Question 2

A pilot study reveals a wide variation in measurement values among subjects with an overall mean value that is higher than among the general population. By increasing the sample size in a subsequent study, the researcher expects to

a. decrease the variation of scores among subjects.
b. increase the variation of scores among subjects.
c. decrease the mean value of scores among subjects.
d. increase the mean value of scores among subjects.