Answer to Question #336160 in Statistics and Probability for Shoula

Statistics and Probability

Question #336160

A sample size of 400 is taken from a population x with a u=4 and o=2.Find the probability that the sample mean is less than 3.85

Expert's answer

"P(\\bar{X}<3.85)=P(Z<\\dfrac{3.85-4}{2\/\\sqrt{400}})"

"=P(Z<-1.5)\\approx0.066807"

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