How large a sample must a pollster take in order to estimate with 95% confidence and to within 3 percentage points, the proporti
on of voters who are in favor of a certain measure
1 answer:
<h3>
Answer: 1068</h3>
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Work Shown:

Notes:
- At 95% confidence, the z critical value is roughly z = 1.96 which is determined using a Z table.
- E = 0.03 to represent the 3% error.
- We're not told the value of
, so we assume the most conservative estimate of 0.5 - <u>Always</u> round up to the nearest integer. The value 1067.111 is closer to 1067, but we round up to 1068 to clear the hurdle needed.
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