1. What is the area under the normal curve between z = 0.0 and z = 1.79?a. 0.4633b. 0.0367c. 0.9599d. 0.0401Answer: _____2. The mean score of a college entrance test is 500; the standard deviation is...

1. What is the area under the normal curve between z = 0.0 and z = 1.79?a. 0.4633b. 0.0367c. 0.9599d. 0.0401Answer: _____2. The mean score of a college entrance test is 500; the standard deviation is 75. The scores are normally distributed. What percent of the students scored below 320?a. About 50.82%b. About 34.13%c. About 7.86%d. About 0.82%Answer: _____3. A new extended-life light bulb has an average life of 750 hours, with a standard deviation of 50 hours. If the life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 hours and 900 hours?a. 95%b. 68%c. 34%d. 99.47%Answer: _____4. The weight of cans of fruit is normally distributed with a mean of 1,000 grams and a standard deviation of 50 grams. What percent of the cans weigh 860 grams or less?a. 0.0100b. 0.8400c. 0.0026d. 0.0001Answer: _____5. A large manufacturing firm tests job applicants. Test scores are normally distributed with a mean of 500 and a standard deviation of 50. Management is considering placing a new hire in an upper-level management position if the person scores in the upper sixth percent of the distribution. What is the lowest score a new hire must earn to qualify for a responsible position?a. 50b. 625c. 460d. 578Answer: _____6. The average score of 100 students taking a statistics final was 70, with a standard deviation of 7. Assuming a normal distribution, what is the probability that a student scored 90 or higher?a. 0.4979b. 0.0021c. 0.9979d. 2.86Answer: _____7. The mean of a normal probability distribution is 60 and the standard deviation is 5. The percent of observations that are between 50 and 70 is ______.Answer:8. The proportion of the area under a normal curve that is to the left of z = 1.40 is _______.Answer:9. The proportion of the area under a normal curve that is to the right of z = -1.71 is _______.Answer:10. The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of 0.5 ounces. The probability that a bag of corn chips weighs more than 23 ounces is ____.Answer:11. Two business major students, in two different sections of an economics class, were comparing test scores. The following shows the sections’ mean and standard deviation.The student in section 2 scored 75. The student’s z score would be _____.Answer:12. A sample of 500 part-time students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. The number of students who earned more than $36,000 was ______.Answer:13. From past history, the scores on a statistics test are normally distributed with a mean score of 70 and a standard deviation of 5. To earn a “C” on the test, a student must be in the top 25% of the class. A student would need to score at least ______ to receive a “C” grade.Answer: