A Researcher Is Interested in the Academic Performance Differences Between

Multiple Choice

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 null hypothesis was correctly accepted.
B) the research hypothesis was correctly accepted.
C) the null hypothesis was correctly rejected.
D) a Type 2 error has been made.
E) a Type 1 error has been made.