For a normal curve, if the mean is 20 minutes and the standard deviation is 5 minutes, the area to the right of 13 minutes is 0.9192.

Question

Quizplus · Accepted Answer

Since the area to the right of 13 minutes is given, we need to find the z-score associated with this area using a standard normal table or calculator.

z = (x - μ) / σ
z = (13 - 20) / 5
z = -1.4

The area to the right of -1.4 on a standard normal table is 0.9192. Since the normal distribution is symmetric, the area to the left of -1.4 is the same as the area to the right of 13.

Therefore, the statement is true.

For a Normal Curve, If the Mean Is 20 Minutes