An airport traffic analyst wants to estimate the proportion of daily takeoffs by small business jets (as opposed to commercial passenger jets or other aircraft) with an error of ± 4 percent with 90 percent confidence. What sample size should the analyst use?
A)385
B)601
C)410
D)423

Question

Quizplus · Accepted Answer

To determine the sample size for estimating a proportion with a specific margin of error and confidence level, the formula n = (Z^2 * p * (1-p)) / E^2 is used. For 90% confidence, Z is approximately 1.645. Assuming p = 0.5 for maximum variability, and E = 0.04, the calculation gives a sample size closest to 423.

An Airport Traffic Analyst Wants to Estimate the Proportion of Daily