(Answered) Determine the sample size n for the estimate of mu for the

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Determine the sample size (n) for the estimate of μ for the following.

E = 2.3, σ = 15.40, confidence level = 95%. Round to the nearest whole number.
E = 4.1, σ = 23.45, confidence level = 90%. Round to the nearest whole number.
E = 25.9, σ = 122.25, confidence level = 99%. Round to the nearest whole number

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