Question

question 3 ch 3 a normal distribution: (check all that apply.) has an area of exactly 1 underneath the density curve. is symmetric. is bimodal. can be completely specified by a mean and a standard deviation.

Explanation:

A normal distribution is a probability distribution. The total area under its density - curve represents the total probability, which is 1. It is symmetric about its mean. It is a unimodal distribution, not bimodal. And it can be fully described by its mean $\mu$ and standard - deviation $\sigma$.

Answer:

has an area of exactly 1 underneath the density curve.
is symmetric.
can be completely specified by a mean and a standard deviation.