Applying Statistical Inference: An Example Donovan conducted an experiment to test the hypothesis that subjects learn words with positive connotations more quickly than words with negative connotations.Although the experimental manipulation produced a real effect, there was so much variability among subject responses that Donovan decided he could not reject the null hypothesis.Donovan's decision illustrates
A)experimental error.
B)measurement error.
C)Type 1 error.
D)Type 2 error.

Question

Quizplus · Accepted Answer

Donovan's inability to reject the null hypothesis despite there being a real effect suggests that he made a Type 2 error, meaning he incorrectly failed to reject the null hypothesis when it was actually false. This could have been due to the high variability in subject responses, leading to a lack of statistical power to detect the true effect.

Applying Statistical Inference: an Example Donovan Conducted an Experiment to Test