Question

fill in the blank. if a sample size is less than _______, the sample size must come from a population having a normal distribution in order to follow normal distribution calculations. a. 50 b. 100 c. 30 d. 40

Explanation:

According to the Central - Limit Theorem, when the sample size \(n < 30\), for the sampling distribution to follow normal - distribution calculations, the population from which the sample is drawn must be normally distributed. When \(n\geq30\), the sampling distribution of the sample mean will be approximately normal regardless of the shape of the population distribution in most cases.

Answer:

C. 30