When comparing a sample to a population, if you know m and s and have a sample size larger than 30, you should conduct a _____ test. A)t B)z C)c² D)phi

Question

Quizplus · Accepted Answer

If you know the population mean and standard deviation and the sample size is larger than 30, you can use the z-test to compare the sample mean to the population mean. This is because the sample mean will be normally distributed due to the central limit theorem when the sample size is large enough. Choice A (t-test) would be used if the sample size is small and the population standard deviation is unknown. Choice C (c²) and Choice D (phi) are not valid statistical tests.

When Comparing a Sample to a Population, If You Know