Stacy purchases a new product that claims it will help her sleep better at night. However, after using it, Stacy discovers that it has no effect on her sleeping habits. Which of the following statements would best characterize Stacy's decision to buy the product?
A) She made a Type I error.
B) She made a Type II error.
C) She made a statistical significance error.
D) She made the correct decision.

Question

Quizplus · Accepted Answer

A Type I error occurs when one incorrectly rejects a true null hypothesis, which in this context means Stacy believed the product would help her sleep better when in fact, it did not.

Stacy Purchases a New Product That Claims It Will Help