Question: A statistics practitioner drew a random sample of 400 observations and found that sample mean was 700 and sample standard deviation was 100. Calculate the

A statistics practitioner drew a random sample of 400 observations and found that sample mean was 700 and sample standard deviation was 100. Calculate the 90%, 95% and 99% confidence intervals. Show your work as an attachment (either manually or using Excel) and explain your findings

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