olejlund7989 olejlund7989

07-06-2023
Mathematics

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The random sample shown below was selected from a normal distribution.
3, 5, 8, 8, 6, 6
Complete parts a and b.
a. Construct a 90% confidence interval for the population mean μ. (Round to two decimal places as needed.)
b. Assume that sample mean x and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n=25 observations. Repeat part a. What is the effect of increasing the sample size on the width of the confidence intervals?

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