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Calculating margin of error

Assignment:

Question 1. A population has a known standard deviation of 25. A simple random sample of 49 items is taken from the selected population. The sample mean (x-bar) is 300. What is the margin of error at the 95% confidence level?

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## Q : Measures of central tendency

(a) Use Excel or MegaStat to find the mean, median, and mode. (b) Do these measures of central tendency agree? Explain.