The average price of a college math textbook is $157 and the standard deviation is $30. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) For the group of 45, find the probability that the average price is between $154 and $158. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) For part b), is the assumption that the distribution is normal necessary? NoYes
The average price of a college math textbook is $157 and the standard deviation is $30. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) For the group of 45, find the probability that the average price is between $154 and $158. Find the third quartile for the average textbook price for this sample size. $ (round to the nearest cent) For part b), is the assumption that the distribution is normal necessary? NoYes
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 $157 and the standard deviation is $30. Suppose that 45 textbooks are randomly chosen. Round all answers to 4 decimal places where possible.
- What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)
- For the group of 45, find the probability that the average price is between $154 and $158.
- Find the third
quartile for the average textbook price for thissample size . $ (round to the nearest cent) - For part b), is the assumption that the distribution is normal necessary? NoYes
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