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Standard Normal Probabilities

Standard Normal Probabilities. 1. Find the probability P(z ≤ z 0 ). Click Insert Function ( f x ) Select Statistical as your function category Choose NORM.S.DIST. 2. Standard Normal Probabilities.

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Standard Normal Probabilities

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  1. Standard Normal Probabilities 1 Find the probability P(z ≤ z0). Click Insert Function (fx) Select Statistical as your function category Choose NORM.S.DIST 2

  2. Standard Normal Probabilities You must enter Z = The value of the standard normal distribution for which you would like the cumulative probability P(z ≤ z0). Cumulative = True if you want P(x ≤ X). = False if you want the height of the curve at x. Use if you would like to graph the function (not used much in this class). Example: P(z ≤ 1.83) = .9664

  3. Standard Normal Probabilities 1 Find the z-value giving you probability P(z ≤ z0) = P0. Click Insert Function (fx) Select Statistical as your function category Choose NORM.S.INV 2

  4. Standard Normal Probabilities You must enter Probability = The probability P0 for which you would like the value of the standard normal distribution giving you P(z ≤ z0) = P0. Example: Fill in the blank: P(z ≤ ____) = .90 The answer is 1.282

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