Suppose you wish to estimate a population proportion p based on sample of n observations. What sample size is required if you want your estimate to be within .03 of p with probability equal to 0.90?
A) 752
B) 423
C) 1,068
D) 1.529
E) none of these

Question

Quizplus · Accepted Answer

To determine the sample size needed to estimate a population proportion within a certain margin of error with a specified confidence level, we use the formula for sample size in proportion estimation: n = (Z^2 * p * (1-p)) / E^2. For a 90% confidence level, Z is approximately 1.645. Assuming p = 0.5 for maximum variability, and E = 0.03, the calculation gives n ≈ 752.

Suppose You Wish to Estimate a Population Proportion P Based