A statistical analysis is internally valid if
A)all t-statistics are greater than |1.96|
B)the regression R2 0.05
C)the population is small,say less than 2,000,and can be observed
D)the statistical inferences about causal effects are valid for the population studied

Question

A statistical analysis is internally valid if
A)all t-statistics are greater than |1.96|
B)the regression R2 > 0.05
C)the population is small,say less than 2,000,and can be observed
D)the statistical inferences about causal effects are valid for the population studied

Quizplus · Accepted Answer

Internal validity refers to the degree to which we can infer a cause-and-effect relationship between our variables. It is a measure of whether the observed results are accurate or due to chance, bias or confounding factors. A statistical analysis is internally valid when the statistical inferences about causal effects are valid for the population under investigation. Therefore, option D is the correct choice. Options A, B, and C are incorrect because they do not measure internal validity.

A Statistical Analysis Is Internally Valid If