Author Question: Suppose students' ages follow a skewed right distribution with a mean of 24 years old and a standard ... (Read 80 times)

haleyc112 · **on:** Jun 24, 2018

Suppose students' ages follow a skewed right distribution with a mean of 24 years old and a standard deviation of 5 years. If we randomly sample 350 students, which of the following statements about the sampling distribution of the sample mean age is incorrect?

A) The mean of the sampling distribution is approximately 24 years old.
B) The shape of the sampling distribution is approximately normal.
C) The standard deviation of the sampling distribution is equal to 5 years.
D) All of the above statements are correct.

Question 2

Transportation officials tell us that 60 of drivers wear seat belts while driving. Find the probability that more than 409 drivers in a sample of 650 drivers wear seat belts.

A) 0.0594 B) 0.6 C) 0.9406 D) 0.4