Prior to initiating a research study,a researcher conducts a power analysis to determine the sample size necessary for a power level of 0.8 and an alpha of 0.05.The researcher will
A) apply a quota sampling technique to improve generalizability.
B) decrease the sample size to minimize costs.
C) increase the sample size to avoid a type II error.
D) use stratified random sampling to minimize error.

Question

Quizplus · Accepted Answer

The minimum acceptable level of power for a study is 0.8,which results in a 20% chance of a type II error.This study has a 40% chance of such an error and is unacceptable.To increase the power,the researcher should increase the sample size.Quota sampling and stratified random sampling do not necessarily affect a study's power.

Prior to Initiating a Research Study,a Researcher Conducts a Power