Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 63 with a mean of 49.8 and a standard deviation of 5.5. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.

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Q: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

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Q: How large a sample should be selected to provide a 99% confidence interval with a margin of error of…

A: Given,standard deviation(σ)=50margin of error (E)=10α=1-0.99=0.01α2=0.005Z0.005=2.58

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Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

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Q: he mean IQ score of adults is​ 100, with a standard deviation of 15. Use the empirical rule to find…

A: Given data, μ=100σ=15   By using emperical formula P(70<X<130)=?

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