EU (European Union) Countries Report That 46% of Their Labor

Multiple Choice

EU (European Union) countries report that 46% of their labor force is female.The United Nations wants to determine if the percentage of females in the U.S.labor force is the same.Based on a sample of 500 employment records, representatives from the United States Department of Labor find that the 95% confidence interval for the proportion of females in the U.S.labor force is .357 to .443.If the Department of Labor wishes to tighten its interval, they should ________________________ .

A) increase the confidence level.
B) decrease the sample size.
C) increase the sample size.
D) Both A and B
E) Both A and C