[Solution] According to my sample data on 21 employees, mean units sold per day is 13, with a standard deviation of 6. What is the 95% confidence interval?
Question: According to my sample data on 21 employees, mean units sold per day is 13, with a standard deviation of 6.
What is the 95% confidence interval? ____________________________
What is the 99% confidence interval? _________________________
Deliverable: Word Document 
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Use this Markov's Inequality calculator - MathCracker.com