Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find Po, the 9th percentile. This is the bone density score separating the bottom 9% from the top 91%.

Which graph represents P,? Choose the correct graph below

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The bone density score corresponding to Pg is

 The score on a mathematics college entry exam are normally distributed with a mean of 68 and a standard deviation of 7.2. Students scoring higher than one standard deviation above the mean will not be enrolled in the mathematics tutoring program. How many of the 750 incoming students can be expected to be enrolled in the tutoring program?

The heights of young American women, in inches, are Normally distributed a with mean of u and a standard deviation of o=2.4. 31. The margin of error for a 99% confidence interval is desired to be t1 inch. What should be the sample size? A) 7 B) 22 C) 38 D) 39

During the summer months, the prices of nonsmoking rooms with a king-size bed in hotels in a certain area are roughly Normally distributed with a mean of $131.80 and a standard deviation of $29.12. 5. A travel agent randomly selects prices of nonsmoking rooms with a king-size bed from 15 hotels in the area. What is the probability that their average cost will be more than $150? A) 0.0077 B) 0.1125 C) 0.2660 D) 0.3678