mid-term_questions(1)

# mid-term_questions(1) - 3 6. Use the Standard Normal Table...

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36. Use the Standard Normal Table to find the following probability for X = Student Heights for which the mean is 66 inches and the standard deviation is 2 inches: P(X > 69) © A) 0.9332 © B) - 0.0668 Go to Calc > Probability Distributions > Normal. Select "Cumulative Probability" and enter <§> C) 0.0668 66 for the Mean and 2 for the Standard Deviation. Select "Input Constant" and © D) 0.8531 enter 69. Click OK and the answer Is 0.933193. This Is the probability that a height is © E) 0.1469 les s tha n 69 a Tn e Probability that a height Is greater than 69 = 1 - 0.933193 = 0.0668 ©F)-0.1469 Alternate Method z-score = (observed - mean)/SD = (69 - 66) / 2 = 1.5 = .9332 (found via Standard Normal Table) 1 - .9332 = 0.0668 35. Use the Standard Normal Table to find the following probability for X = Student Heights for which the mean is 66 inches and the standard deviation is 2 inches: P(66 < X < 69) 9 A) - 0.4332 G o t 0 Ca | C >
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