A researcher is interested in the academic performance differences between individuals using an optimistic versus a pessimistic approach to their studies.If the researcher fails to find a significant difference,when in fact one exists in the population,
A)the research hypothesis was correctly accepted.
B)a Type I error has been made.
C)the null hypothesis was correctly rejected.
D)the null hypothesis was correctly accepted.
E)a Type II error has been made.

Question

Quizplus · Accepted Answer

If the researcher fails to find a significant difference, when in fact one exists in the population, this suggests that the null hypothesis was wrongly accepted, meaning that the researcher made a Type II error. A Type II error occurs when the researcher fails to reject a null hypothesis that is actually false. In other words, the researcher failed to detect a real difference that exists in the population.

A Researcher Is Interested in the Academic Performance Differences Between