Extensive variation in the measure of the dependent variable in an experiment will.
A)increase the probability of a Type I error
B)increase the power of a statistical test
C)decrease the power of a statistical test
D)enable the use of a smaller sample

Question

Quizplus · Accepted Answer

A large variation in the dependent variable can make it harder to detect a true effect, causing a decrease in power. It can also make it more likely to find a significant result by chance, leading to an increase in Type I error. Therefore, option C is the correct answer. Option B and D are incorrect because a larger variation in the dependent variable could either increase or decrease the power of a statistical test, depending on the size of the effect being measured and other factors. Option D is also incorrect because a larger variation does not necessarily permit the use of a smaller sample size.

Extensive Variation in the Measure of the Dependent Variable in an Experiment