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a.)A normal random variable X has unknown mean μ and standard deviation σ = 6. What...

a.)A normal random variable X has unknown mean μ and standard deviation σ = 6. What is the margin of error E for a 98 percent confidence interval for μ, based on a random sample of size

b.)(b) What sample size would be needed in part (a) to have a margin of error

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  1. The margin of error depends on the sample size
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