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5. About what percent of the people in this age group have scores between 110 and 135? 6. About what percent of the people in this age group have scores below 135? 7. About what percent of the people have at least a score of 85? 8. About what percent of the people have at most a score of 60?

5. About what percent of the people in this age group have scores between 110 and 135? 6. About what percent of the people in this age group have scores below 135? 7. About what percent of the people have at least a score of 85? 8. About what percent of the people have at most a score of 60?

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Scores on the Wechsler IQ scale for the 20-34 age group are normally distributed with a mean score of 110 and a standard deviation of 25. 1. Draw and label a normal distribution curve using this data.
Transcribed Image Text:Scores on the Wechsler IQ scale for the 20-34 age group are normally distributed with a mean score of 110 and a standard deviation of 25. 1. Draw and label a normal distribution curve using this data.
Use the normal curve you created to answer the following questions. Put your final answers in the column on the right, but be sure to show your work in the column on the left! 2. About what percent of the people in this age group have scores above 110? 3. About what percent of the people in this age group have scores above 160? 4. In what range do the middle 95% of all IQ scores lie in this age group? 5. About what percent of the people in this age group have scores between 110 and 135? 6. About what percent of the people in this age group have scores below 135? 7. About what percent of the people have at least a score of 85? 8. About what percent of the people have at most a score of 60? P (>110) = 1-p (<) =1-p(z < 0) = 1-0.5 = 0.5 P(x > 160) = .025 H120=110+50, also 60 to 160
Transcribed Image Text:Use the normal curve you created to answer the following questions. Put your final answers in the column on the right, but be sure to show your work in the column on the left! 2. About what percent of the people in this age group have scores above 110? 3. About what percent of the people in this age group have scores above 160? 4. In what range do the middle 95% of all IQ scores lie in this age group? 5. About what percent of the people in this age group have scores between 110 and 135? 6. About what percent of the people in this age group have scores below 135? 7. About what percent of the people have at least a score of 85? 8. About what percent of the people have at most a score of 60? P (>110) = 1-p (<) =1-p(z < 0) = 1-0.5 = 0.5 P(x > 160) = .025 H120=110+50, also 60 to 160
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