What is the 95 percent confidence interval estimate of, Mathematics

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What is the 95 percent confidence interval estimate of

A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4. A sample of 49 customers revealed that the mean is $25. What is the 95 percent confidence interval estimate of μ?

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Mathematics: What is the 95 percent confidence interval estimate of

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Mathematics: What is the 95 percent confidence interval estimate of

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