The U.S.Department of Labor wants to estimate the percentage of females in the labor force to within ±2% with 90% confidence.As a planning value they use 46%, the reported percentage of females in the labor force of EU (European Union) countries.How many employment records should be sampled?
A)121
B)269
C)451
D)382
E)1681

Question

Quizplus · Accepted Answer

To determine the sample size for estimating a proportion with a specified margin of error and confidence level, the formula is n = (Z^2 * p * (1-p)) / E^2. For 90% confidence, Z is approximately 1.645. Using p = 0.46 and E = 0.02, the calculation yields approximately 1681.

The USDepartment of Labor Wants to Estimate the Percentage of Females