Question

Which statements must be true to model a data set using a normal distribution?

The sample mean must equal the population mean.
The standard deviation of the population must be less than 30.
The sample must be randomly selected.
The sample size, n, must be at least 30.
The population mean must be greater than the sample mean.

Answer 1

The sample must be randomly selected.

The sample size, n, must be at least 30.

Explanation:

Plato/Edmentum

Answer 2

The sample must be randomly selected.

The sample size, n, must be at least 30.

Explanation:

Plato