Question

Consider the following. (Round your answers to two decimal places.)

(a) Determine the value of the confidence coefficient z(α/2) for 1 − α = 0.85.


(b) Determine the value of the confidence coefficient z(α/2) for 1 − α = 0.98.

2. how large a sample should be taken if the population mean is to be estimated with 99% confidence to within $75? The population has a standard deviation of $903. (round your answer up to the next whole number)

Answer 1