In comparing the difference between two independent population means,by using two small independent samples,the sampling distributions of the population means are at least approximately ________________.
A)skewed right
B)skewed left
C)normal
D)binomial

Question

Quizplus · Accepted Answer

According to the Central Limit Theorem, when the sample size is large enough (usually a sample size greater than 30), the sampling distribution of the mean tends to be normal, regardless of the shape of the original population distribution. In the case of small independent samples, if the populations are approximately normal or the sample sizes are not too small (e.g., greater than 10), then the sampling distributions of the means can also be considered normal.

In Comparing the Difference Between Two Independent Population Means,by Using