nd the area of the shaded region. The graph depicts the standard normal distribu

Question

nd the area of the shaded region. The graph depicts the standard normal distribution with mean O and standard deviation 1. 6. Fi 1.82 1.82 A) 0.4656 8) 0.9656 C)0.0344 D)-0.0344 7. distributed with a mean of 200 A bank's loan officer rates applicants for credit. The ratings are normally and a standard deviation of 50, Find P60, the score which separates the lower 60 % from the top A) 187.5 B) 212.5 C) 207.8 D) 211.3 40%. 8. For women aged 18-24, systolic blood pressures (in mm Hg) are normally distributed with a mean of 1148 and a standard deviation of 13.1. if 23 women aged 18-24 are randomly selected, find the probability that their mean systolic blood pressure is between 119 and 122. A) 0.9341 8)0.3343 C0.0577 D) 0.0833 For questions 9 and 10: Lengths of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. Find the probability of a pregnancy lasting more than 250 days. A).1151 9. B) .8849 C).4522 D) .5478 10. Find the probability of a pregnancy lasting more than 280 days. A).0359 B).9641 C).7881 D)2119 11. Fill in the blank: The Central Limit Theorem tells us that for a population with any distribution, the distribution of the sample means approaches a normal distribution as the sample size A) increases B) decreases C) remains constant D) none of the above

Explanation / Answer

6. Correct answer: (B) 0.96562

7. Correct answer: (B) 212.5

8. Correct answer: (C) 0.0577

9. Correct answer: (B) 0.8849

10. Correct answer: (D) 0.2119

11. increases

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