Asked by Kate

A firm having 4000 employees took a random sample of 25 in order to estimate their average annual state tax payment with 99% confidence. If the results were X = $640 and s = $20, what is the best interval estimation?
Answered by PsyDAG
99% = mean ± 2.575 SEm

SEm = SD/√n
Answered by nanci
67
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