Author Question: Which of the following statements are true regarding the normal distribution curve? a. It is ... (Read 43 times)

panfilo · **on:** Jun 24, 2018

Which of the following statements are true regarding the normal distribution curve?
a. It is symmetrical.
b. It is bell-shaped.
c. It is asymptotic in that each end approaches the horizontal axis, but never reaches it.
d. Its mean, median, and mode are located at the same position.
e. All of these statements are true.

Question 2

A population that consists of 500 observations has a mean of 40 and a standard deviation of 15 . A sample of size 100 is taken at random from this population. The standard error of the sample mean equals:
a. 2.50.
b. 12.50.
c. 1.343.
d. 1.50.