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Answer to Question #317885 in Statistics and Probability for Kris
Question #317885
A researcher wants to take a random sample of size 40 of a certain population with a mean of 23.5 and a variance of 18.49. What is the approximate standard deviation of sample means?
Expert's answer
"\\sigma_{\\bar X}=\\frac{\\sigma}{\\sqrt{n}}=\\frac{\\sqrt{18.49}}{\\sqrt{40}}\\approx 0.68."
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