a. Calculate the preliminary sample size using difference estimation for a to e from the information provided. Apply the finite correction factor when it is appropriate.

b. In general, what is the effect on the preliminary sample size (increase, decrease, no effect, or cannot determine without additional information) for each of the following independent changes, assuming the other components of sample size are held constant ?

c. Explain why each of your answers in 5-31.a is the same as or different from the answer 5-32.a.

Question 5-31

a. Using difference estimation, calculate the preliminary sample size for a to e from the information provided. Apply the finite correction factor when it is appropriate.

b. In general, what is the effect on the preliminary sample size (increase, decrease, no effect, or cannot determine without additional information) of each of the following independent changes, assuming the other components of sample size are held constant ?

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a b C d e Population size 5,000 10,000 5,000 10,000 5,000 Required confidence level. 90% 90% Allowable error 50,000 80,000 99% 50,000 80% 90% 80,000 50,000 Estimated standard deviation 100 150 100 150 100