Question

the mean and the standard deviation of a normal population are called parameters. the mean and the standard deviation of a random sample from a population are called statistics. complete in a normal population, 95% of the values lie within how many standard deviations of the mean don 1 2 3 4

Explanation:

Step1: Recall normal - distribution property

In a normal distribution, approximately 95% of the data lies within a certain number of standard - deviations of the mean.

Step2: Identify the number

The empirical rule (68 - 95 - 99.7 rule) states that about 95% of the values in a normal population lie within 2 standard deviations of the mean.

Answer:

2