Posted by Sonia on .
1. 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 bellshaped.
c. If a population has a normal distribution, the mean and the median are not equal.
d. The graph of a normal distribution is symmetric.

statistic 
PsyDAG,
A normal distribution is a symmetrical, bellshaped distribution.