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Moderate

Congressional Approval

APSTAT-VFTPP1

​Last month, a pollster found that a sample proportion of $48\%$ of the national population approve of their congressional representative.

A $99\%$ confidence interval was constructed on this data with a $5\%$ margin of error. Suppose instead that a $90\%$ confidence interval was constructed on this same sample.

This $90\%$ confidence interval will have a margin of error of about

A

$1.645\%$

B

$3.19\%$

C

$5\%$

D

$4.325\%$

E

$2.326\%$