Which of the following is a true statement when alpha 005 A

Which of the following is a true statement when alpha = 0.05?
   
A. When the null hypothesis is true, there is a 5% chance of making a type I error. This means we reject the notion that 0.25 of Americans believe in UFOs.
   
B. When the null hypothesis is true, there is a 5% chance of making a type II error. This means we reject the notion that 0.25 of Americans believe in UFOs.
   
C. When the null hypothesis is true, there is a 5% chance of making a type II error. This means we fail to reject the notion that 0.25 of Americans believe in UFOs.

D. When the null hypothesis is true, there is a 5% chance of making a type I error. This means we fail to reject the notion that 0.25 of Americans believe in UFOs.

Solution

A. When the null hypothesis is true, there is a 5% chance of making a type I error. This means we reject the notion that 0.25 of Americans believe in UFOs.

is the answer