Suppose the heights, in inches, of Santa Fe students are normally distributed wi

Question

Suppose the heights, in inches, of Santa Fe students are normally distributed with an average 66.1 inches and standard deviation 3.88 inches. The probability that a randomly selected Santa Fe student is taller than 68 inches is: A. 0.3122 B. 0.6878 C. 0.3782 D. 0.7500 The probability that a randomly selected Santa Fe student is between 63 inches and 68 inches is: A. 0.2122 B. 0.3122 C. 0.7878 D. 0.4757 80% of Santa Fe students are at least how tall? A. 69.37 inches B. 62.83 inches C. 65.43 inches D. 66.1 inches

Explanation / Answer

10. P(X > 68)

= P(z > (68 - 66.1)/3.88)

= P(z > 0.49)

= 0.3122

Option A

11. Option D

12. Option A

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