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The average price of a college math textbook is $165 and the standard deviation is $29. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of ? - N( 165 ✓, 4.3231✔ b. For the group of 45, find the probability that the average price is between $162 and $165. c. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) d. For part b), is the assumption that the distribution is normal necessary? Yes No

The average price of a college math textbook is $165 and the standard deviation is $29. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of ? - N( 165 ✓, 4.3231✔ b. For the group of 45, find the probability that the average price is between $162 and $165. c. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) d. For part b), is the assumption that the distribution is normal necessary? Yes No

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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The average price of a college math textbook is $165 and the standard deviation is $29. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of ? ~ N( 165 b. For the group of 45, find the probability that the average price is between $162 and $165. c. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) d. For part b), is the assumption that the distribution is normal necessary? YesOⒸ No 4.3231✔
Transcribed Image Text:The average price of a college math textbook is $165 and the standard deviation is $29. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of ? ~ N( 165 b. For the group of 45, find the probability that the average price is between $162 and $165. c. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) d. For part b), is the assumption that the distribution is normal necessary? YesOⒸ No 4.3231✔
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