Even if a treatment has no effect,it is still possible to obtain an extreme sample mean that is very different from the population mean.What outcome is likely if this happens?
A)Reject H0 and make a Type I error
B)Correctly reject H0
C)Fail to reject H0 and make a Type II error
D)Correctly fail to reject H0

Question

Quizplus · Accepted Answer

Even if the treatment has no effect, there is always a chance of obtaining an extreme sample mean just by chance. If this happens, and we reject the null hypothesis, we are making a Type I error (false positive). This is because we are concluding that the treatment had an effect, when in fact it did not.

Even If a Treatment Has No Effect,it Is Still Possible