A polling agency wants to determine the size of a random sample needed to estimate the proportion of homeowners who have an electronic home security system. The estimate should have margin of error no more than 4 percentage points at a 95% level of confidence. Choose the most conservative answer that is closest to your calculated number, rounding to the nearest whole person.
A)They should poll at least 1100 people.
B)They should poll at least 600 people.
C)They should poll at least 1000 people.
D)They should poll at least 500 people.

Question

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The Answer of A polling agency wants to determine the size of a random sample needed to estimate the proportion of homeowners who have an electronic home security system. The estimate should have margin of error no more than 4 percentage points at a 95% level of confidence. Choose the most conservative answer that is closest to your calculated number, rounding to the nearest whole person.
A)They should poll at least 1100 people.
B)They should poll at least 600 people.
C)They should poll at least 1000 people.
D)They should poll at least 500 people.

A Polling Agency Wants to Determine the Size of a Random