What is the 95% confidence interval for the mean number, Basic Statistics

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What is the 95% confidence interval for the mean number

a manufacturer of microwaves gathers information on microwave sales from a random sample of 50 stores in a large retail chain. In the sample, the mean number of microwaves sold per store last week was 19 with standard deviation 2. What is the 95% confidence interval for the mean number of microwaves sold at retail store in the chain last week?

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Basic Statistics: What is the 95% confidence interval for the mean number

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Basic Statistics: What is the 95% confidence interval for the mean number

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