7.How many standard deviations are _ ED there in each inflection point? A.O C. 2 B. 1 D. 3 8.Which of the following denotes the standard normal distribution? A. A C.Y B.X D. Z 9. A random variable X has a mean of 12 and a standard deviation of 3.2. Whatis the corresponding z-score for x = 8 ? A. -1.25 C. -1.75 B. -1.50 D. -2.25 10.What is the area under the normal curve if the z-score given is 2.14? A. 0.9830 C. 0.9838 B. 0.9834 D. 0.9842 11.What is the z-score if the area n? under the normal curve is 0.0475? A. -1.66 C. 1.66 B. -1.67 D. 1.67 12. What is the area under the normal _ curve between the z-scores -1.99 and 1.56? A. 0.9173 3 B. 0.9317 C. 0.9369 D. 0.9639 13. What is the area of the PZ>2.58 _ using the standard normal curve? A. 0.0049 B.0.0051 C. 0.9949 D.0.9951 14. In an achievement test, the mean _ score of normally distributed values is 70 and the standard deviation is 12. What is the percentage of students who gota score of 85 and above? A. 0.1056 B. 0.1075 C. 0.8925 D. 0.8944 15. What is the value of 70th percentile _ in a standard normal distribution? A. 0.51 B. 0.52 C. 0.61 D. 0.62
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