Dr. Mischel concluded that her independent variable did not have effect on the dependent variable when, in the population, the independent did have an effect. Dr. Mischel
A) made a Type I error.
B) made a Type II error.
C) used an inappropriately large sample size.
D) both b and c

Question

Quizplus · Accepted Answer

Dr. Mischel made a Type II error, which occurs when a researcher fails to reject a null hypothesis that is actually false. This means that the independent variable did have an effect on the dependent variable in the population, but Dr. Mischel failed to detect it in her sample. A Type II error is often caused by low statistical power, which can occur if the sample size is too small or there is too much variability in the data. Therefore, the answer is not D, which includes option C that suggests an inappropriately large sample size.

Dr Mischel Concluded That Her Independent Variable Did Not Have