A Researcher Compares Two Different Treatments for Depression

Multiple Choice

A researcher compares two different treatments for depression. The result is not statistically significant so the researcher says that the two treatments are equally effective. Which one of the following statements is correct?

A) The researcher should have instead concluded that there is not sufficient evidence to conclude that the two treatments are different.
B) The researcher should have instead concluded that there is not sufficient evidence to conclude that the two treatments are equally effective.
C) A Type I error may have been made.
D) A Type I error was definitely made.