Author Question: Given that the random variable X is normally distributed with a mean of 80 and a standard deviation ... (Read 82 times)

penza · **on:** Jun 24, 2018

Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10, P(85 X 90) is:
a. 0.5328 b. 0.3413
c. 0.1915 d. 0.1498

Question 2

The power of a test is the probability of rejecting the null hypothesis when the alternative hypothesis is true.
a. True
b. False
Indicate whether the statement is true or false