A government testing agency studies aspirin capsules to see

A government testing agency studies aspirin capsules to see if customers are getting cheated with capsules that contain lesser amounts of 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?

Solution

THe testing agency has committed type I error. They have concluded that capsules contain a mean amount below the advertised level when in fact the advertised level is the true mean. A type I error is the incorrect rejection of a true null hypothesis.