Short Answer

If the Census wants to increase its level of confidence and keep the error bound the same by taking another survey, what changes should it make?

If the Census wants to increase its level of confidence and keep the error bound the same by taking another survey, than they should increase the sample size $n$ .

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TABLE OF CONTENTS

Step 1: Given Information

The sample mean is $8.2$ minutes. There is a known standard deviation of $2.2$ minutes. The population distribution is assumed to be normal.

Step 2: Explanation

A tighter confidence interval with a smaller margin of error will arise from a bigger sample size or lower variability. A wider confidence interval with a larger margin of error will arise from a smaller sample size or higher variability.

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Short Answer

If the Census wants to increase its level of confidence and keep the error bound the same by taking another survey, what changes should it make?

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Step 1: Given Information

Step 2: Explanation

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Introductory Statistics

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Short Answer

If the Census wants to increase its level of confidence and keep the error bound the same by taking another survey, what changes should it make?

Step by Step Solution

Step 1: Given Information

Step 2: Explanation

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