A music collection includes 13 rock CDs, 14 country CDs, 4 classical CDs, and 5 hip hop CDs. a. What is the probability that a CD randomly selected from the collection is a classical CD?
b. What is the probability that a CD randomly selected from the collection is not a classical CD?

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95