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 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.