AP Statistics - Estimates

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What is , or the expected value of for any distribution?

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What is , or the expected value of for any distribution?

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The next local election is predicted to have a $\small 50:50$ split in votes for the top two candidates. How many people should be polled to obtain a margin of error of 3% at the 95% confidence level?

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The next local election is predicted to have a $\small 50:50$ split in votes for the top two candidates. How many people should be polled to obtain a margin of error of 3% at the 95% confidence level?

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When dealing with confidence intervals, the margin of error gets smaller when z* gets ________ and n gets _________.

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When dealing with confidence intervals, the margin of error gets smaller when z* gets ________ and n gets _________.

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Estimates

Practice Questions