Question 413:

Asked on September 27, 2008

1

Answer:

No answer provided yet.

The best answer here is 30, but this is a poorly worded question. I believe they are asking at what point it is appropriate to begin using the normal distribution, and this has been shown to be around 30. If you have less than 30 you can still use parametric statistics, such as the t-test, which accounts for the smaller sample size. So pick b and tell the instructor to update the question.