According to the central limit theorem the sampling distribu

According to the central limit theorem, the sampling distribution of the mean will be approximately normally distributed for most populations, regardless of the shape, if

At least thirty samples are selected

Samples of at least 30 observations are selected

At least 300 samples are selected

At least 300 samples which 10 observations in each are selected.

Solution

According to the central limit theorem, the sampling distribution of the mean will be approximately normally distributed for most populations, regardless of the shape, if

At least thirty samples are selected