Exercise 2 The Central Limit Theorem, the key to building a confidence interval for the population mean p with a Z test, states which one of the following: A. We

can always use a normal curve to approximate the distribution of the sample mean X. B. If n is large (e.g. n > 30) and the original population is normal, then the distribution of the sample mean X can be approximated by a normal curve. C. We can always use a normal curve to approximate the distribution of sample values X. D. If n is large (e.g. n > 30) then the distribution of the sample mean X can be approximated by a normal curve even if the original distribution is not normal. E. If n is large (e.g. n > 30), then the distribution of the sample values X can be approximated by a normal curve even if the original distribution is not normal.