Suppose that another online site claims that the annual salary of administrators at CU isx ̅=$73,490. Assume that \sigma is known to be $21,310 for college administrators’ salaries. Suppose that the x ̅ = $73,490 is based on a random sample of n = 41 administrators. Find a 90% confidence interval for the population mean annual salary of local college administrators. What is the margin of error?
Added by Scott C.
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Step 1: Identify the given information - Sample mean, \( \bar{x} = 73,490 \) - Population standard deviation, \( \sigma = 21,310 \) - Sample size, \( n = 41 \) - Confidence level = 90% Show more…
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