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Use the given confidence interval to find the margin of error and the sample mean. ​(72.5​,86.1​)

Use the given confidence interval to find the margin of error and the sample mean. ​(72.5​,86.1​)

Math   Statistics-And-Probability   
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Answer #1

Let be the sample mean

and be the margin of error

and

by adding above it

eq(1)

Hence

sample mean =79.3

and  the margin of error= 6.8

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