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March 26, 2017

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An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school teachers.

  • Statistics - ,

    99% = mean ± 2.575 SEm

    SEm = SD/√n

    I'll let you do the calculations.

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