Question

Which of the following statements are correct?

a. A normal distribution is any distribution that is not unusual.

b. The graph of a normal distribution is bell-shaped.

c. If a population has normal ditribution, the mean and the median are not equal.

d. The graph of a normal distribution is symmetric.

Answer 1

b and d are correct

Answer 2

Which of the following are correct statements regarding the goodness-of-fit test?
A) Data may be of nominal scale.
B) Population must be normal.
C) All the expected frequencies must be equal.
D) The expected frequencies must be equal.