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The Digest of Education Statistics reported that the mean salary for teach- ers in 2012 was...

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Basic Math

The Digest of Education Statistics reported that the meansalary for teach- ers in 2012 was $56,410. Suppose that the samplesize was 87 and that the sample standard deviation was $15,000(note that we only have the sample standard deviation now...)
(a) what is the 90% confidence interval for the populationmean?
(b) for the same sample size, find the 99% confidence intervalfor the population mean.

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Answer Given that The Digest of Education Statistics reported that the mean salary for teach ers in 2012 was 56410 Suppose that the sample size was    See Answer
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