What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) For the group of 45, find the probability that the average price is between $182 and $185. Find the first quartile for the average textbook price for this sample size. $ (round to the nearest cent)
What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) For the group of 45, find the probability that the average price is between $182 and $185. Find the first quartile for the average textbook price for this sample size. $ (round to the nearest cent)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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Question
The average price of a college math textbook is $179 and the standard deviation is $25. 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 $182 and $185. - Find the first 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
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