A government testing agency studies aspirin capsules to see if they contain less medication than advertised. Suppose the testing agent concludes the capsules contain a mean amount below the advertised level when in fact the advertised level is the true mean. Which type of error, if any, did the testing agency commit?
A) This is a Type I error.
B) This is a Type II error.
C) This is a correct decision.
D) It is impossible to answer this question.

Question

Quizplus · Accepted Answer

A Type I error occurs when the null hypothesis is true, but is incorrectly rejected. In this case, the null hypothesis is that the capsules contain the advertised amount, and the agency incorrectly concludes they contain less.

A Government Testing Agency Studies Aspirin Capsules to See If