Which of the following statements is NOT a valid rule for determining sample size?
A) Sample sizes larger than 30 and less than 500 are appropriate for most research.
B) Sample sizes smaller than 30 and larger than 500 are inappropriate for most research.
C) Sample size should be about 10 times larger than the number of variables measured in a study.
D) With tight controls, experimental research can be successful with samples as small as 10.

Question

Quizplus · Accepted Answer

This statement is incorrect as sample sizes larger than 500 may be appropriate for certain research studies. The other statements are valid rules for determining sample size, with some exceptions depending on the specific research design and analysis plan.

Which of the Following Statements Is NOT a Valid Rule