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3. Determine each of the following areas and show these graphically. Use probability notation in you final answer. a. above z = 1.46 b. between z = 2.20 and z =1.00 4. The IQ scores of children in a special education class are normally distributed with = 95 and = 10. a. What is the probability that one of the children has an IQ score below 100? b. What is the chances that a child has an IQ score of 90? 5. A electrical company claims that the average life of the bulbs it manufactures is 1,200 hours with a standard deviation of 250 hours. If random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. greater than 1,150 hours? b. less than 1,250 hours?

3. Determine each of the following areas and show these graphically. Use probability notation in you final answer. a. above z = 1.46 b. between z = 2.20 and z =1.00 4. The IQ scores of children in a special education class are normally distributed with = 95 and = 10. a. What is the probability that one of the children has an IQ score below 100? b. What is the chances that a child has an IQ score of 90? 5. A electrical company claims that the average life of the bulbs it manufactures is 1,200 hours with a standard deviation of 250 hours. If random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. greater than 1,150 hours? b. less than 1,250 hours?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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3. Determine each of the following areas and show these graphically. Use probability notation in you final answer. a. above z = 1.46 b. between z = 2.20 and z =1.00 4. The IQ scores of children in a special education class are normally distributed with = 95 and = 10. a. What is the probability that one of the children has an IQ score below 100? b. What is the chances that a child has an IQ score of 90? 5. A electrical company claims that the average life of the bulbs it manufactures is 1,200 hours with a standard deviation of 250 hours. If random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. greater than 1,150 hours? b. less than 1,250 hours?
Transcribed Image Text:3. Determine each of the following areas and show these graphically. Use probability notation in you final answer. a. above z = 1.46 b. between z = 2.20 and z =1.00 4. The IQ scores of children in a special education class are normally distributed with = 95 and = 10. a. What is the probability that one of the children has an IQ score below 100? b. What is the chances that a child has an IQ score of 90? 5. A electrical company claims that the average life of the bulbs it manufactures is 1,200 hours with a standard deviation of 250 hours. If random sample of 100 bulbs is chosen, what is the probability that the sample mean will be: a. greater than 1,150 hours? b. less than 1,250 hours?
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