Given a normal random variable x with mean of 70 and standard deviation of 12, the value of the standard normal random variable z associated with x = 82 is larger than 0.

Question

Quizplus · Accepted Answer

We can use the formula z = (x - μ) / σ to find the standard normal random variable associated with x = 82:

z = (82 - 70) / 12 = 1

Since 1 is larger than 0, the statement is true and the answer is A.

Given a Normal Random Variable X with Mean of 70