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18, For females, find the first quartile Qı, which is the length separating the bottom 25% from the top 75%.

18, For females, find the first quartile Qı, which is the length separating the bottom 25% from the top 75%.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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I'm having a hard time with #15 and #18, can you help please?

Seat Designs. In Exercises 13–20, use the data in the table below for sitting adult males and females (based on anthropometric survey data from Gordon, Churchill, et al.). These data are used often in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats. (Hint: Draw a graph in each case.) Sitting Back-to-Knee Length (inches) Mean St. Dev. Distribution Males 23.5 in. 1.1 in. Normal Females 22.7 in. 1.0 in. Normal 13. Find the probability that a male has a back-to-knee length less than 21 in. 14. Find the probability that a female has a back-to-knee length greater than 24.0 in. 15. Find the probability that a female has a back-to-knee length between 22.0 in. and 24.0 in. 16. Find the probability that a male has a back-to-knee length between 22.0 in. and 24.0 in. 17. For males, find Po0, which is the length separating the bottom 90% from the top 10%. 18. For females, find the first quartile Q1, which is the length separating the bottom 25% from the top 75%.
Transcribed Image Text:Seat Designs. In Exercises 13–20, use the data in the table below for sitting adult males and females (based on anthropometric survey data from Gordon, Churchill, et al.). These data are used often in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats. (Hint: Draw a graph in each case.) Sitting Back-to-Knee Length (inches) Mean St. Dev. Distribution Males 23.5 in. 1.1 in. Normal Females 22.7 in. 1.0 in. Normal 13. Find the probability that a male has a back-to-knee length less than 21 in. 14. Find the probability that a female has a back-to-knee length greater than 24.0 in. 15. Find the probability that a female has a back-to-knee length between 22.0 in. and 24.0 in. 16. Find the probability that a male has a back-to-knee length between 22.0 in. and 24.0 in. 17. For males, find Po0, which is the length separating the bottom 90% from the top 10%. 18. For females, find the first quartile Q1, which is the length separating the bottom 25% from the top 75%.
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