U E S T I O N 1 Provide an appropriate response. Use a standard normal table to find the z-score that corresponds to the cumulative area of 0.7019. A . B . 0.83 5 0.83 5 C -0.53 . D 0.53 . Q U E S T I O N 2 Provide an appropriate response Find the z-score that has 84.85% of the distribution's area to its right. A . 0.3 9 B . 1.0 3 C 0.3 . 9 D 1.0 . 3 Q U E S T I O N 3 Provide an appropriate response Find the z-scores for which 90% of the distribution's area lies between -z and z. A . B . C . D . (-0.99, 0.99) (-2.33, 2.33) (-1.645, 1.645) (-1.96, 1.96) Q U E S T I O N 4 Provide an appropriate response. Assume that the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 women are randomly selected, find the probability that they have a mean height greater than 63.0 inches. A . B . C . D . 0.99 18 0.00 82 0.28 81 0.89 89 Q U E S T I O N 5 Provide an appropriate response. Assume that blood pressure readings are normally distributed with a mean of 115 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 117. A . B . C . D . 0.00 62 0.86 15 0.88 19 0.99 38 Q U E S T I O N 6 Provide an appropriate response. Find the z-score that corresponds to the given area under the standard normal curve. A . B . z = 0. 42 z=0.4 0 Q U E S T I O N 7 Provide an appropriate response. The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x-value that corresponds to the z-score 2.33. A . B . C . D . 72. 3 58. 4 75. 0 81. 7 Q U E S T I O N 1 Provide an appropriate response. For the standard normal curve, find the z-score that corresponds to the 90th percentile. A . B . C . D . 1.2 8 1.5 2 0.2 8 2.8 1 Q U E S T I O N 2 Provide an appropriate response. Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $37,000 and a standard deviation of $5000. What is the cutoff salary for teachers in the bottom 10%? A . B . C . D . $28,7 75 $30,6 00 $45,2 25 $43,4 00 Q U E S T I O N 3 Provide an appropriate response. Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $29,000 and a standard deviation of $2000. What is the cutoff salary for teachers in the top 10%? _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ ______ Q U E S T I O N 4 Provide an appropriate response Find the z-score that is greater than the mean and for which 70% of the distribution's area lies to its left. A . B . C . D . 0.4 7 0.8 1 0.5 3 0.9 8 Q U E S T I O N 5 Provide an appropriate response. Find the z-score that has 84.85% of the distribution's area to its right. A . 1.0 3 B 1.0 . 3 C . 0.3 9 D 0.3 . 9 Q U E S T I O N 6 Provide an appropriate response. The average number of pounds of red meat a person consumes each year is 196 with a standard deviation of 22 pounds (Source: American Dietetic Association). If a sample of 50 individuals is randomly selected, find the probability that the mean of the sample will be greater than 200 pounds. A . B . C . 0.88 15 0.09 85 0.76 13 D 0.90 . 15 Q U E S T I O N 7 Provide an appropriate response. Find the z-score for which 99% of the distribution's area lies between -z and z. A . B . C . D . (-1.645, 1.6 45) (-2.33, 2.33 ) (-1.28, 1.28 ) (-2.575, 2.5 75) Q U E S T I O N 8 Provide an appropriate response.The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual? A . B . C . D . none of these $6180 $5180 $6350 Q U E S T I O N 1 Provide an appropriate response. Use a standard normal table to find the z-score that corresponds to the 80th percentile. A . B . C . D . 2.41 1.40 5 0.84 0.2 Q U E S T I O N 2 Provide an appropriate response. The average number of pounds of red meat a person consumes each year is 196 with a standard deviation of 22 pounds (Source: American Dietetic Association). If a sample of 50 individuals is randomly selected, find the probability that the mean of the sample will be less than 200 pounds. A . B . C . D . 0.90 15 0.09 85 0.76 13 0.88 15 Q U E S T I O N 3 Provide an appropriate response.The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x-value that corresponds to the z-score 2.33. A . B . C . D . 81. 7 75. 0 58. 4 72. 3 Q U E S T I O N 4 Provide an appropriate response. Assume that the heights of men are normally distributed with a mean of 69.5 inches and a standard deviation of 2.1 inches. If 36 men are randomly selected, find the probability that they have a mean height greater than 70.5 inches. A . B . C . D . 0.90 05 0.81 88 9.96 71 0.00 21 Q U E S T I O N 5 Provide an appropriate response.Find the z-score for which 70% of the distribution's area lies to its right. A . 0.4 7 B . 0.9 8 C . 0.8 1 D. 0.5 3