Answer to Question #350868 in Statistics and Probability for rei

Statistics and Probability

Question #350868

What is the probability that the mean random sample of 9 students will be less than 88? Given: = 4 ̅ = 88 = 86 n=9

Expert's answer

"P(X<88)=P(Z<\\dfrac{88-\\mu}{\\sigma\/\\sqrt{n}})"

"=P(Z<\\dfrac{88-86}{4\/\\sqrt{9}})=P(Z<1.5)"

"\\approx0.9332"

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