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A man living in a large apartment building believes that one of his neighbors is taking his newspaper on paper is always delivered, but he also retrieves it at the door by 8:30 am. On the weekend, however, he Saturday and Sunday mornings. He believes this because during the week (weather permitting) his wakes up anywhere between 7:00 am and noon and often his paper is missing. To test his theory, he decides to start keeping track of the days he wakes up at normal weekday times vs. sleeping in on the weekends and noting whether he has a newspaper that morning. He does this for 40 non-holiday weekends. And finds that on 36 of the 45 days he woke up before 9:00am he had a paper and on 20 of the 35 days he woke up after 9:00am he had a paper. Test at the a= .05 level if the difference in proportions (of days with papers) is different than zero (note that there are 80 days total). Then test whether the sleeping in is independent of the paper being missing. For extra credit, can you determine that sleeping in late is what's causing the paper to be missing?

A man living in a large apartment building believes that one of his neighbors is taking his newspaper on paper is always delivered, but he also retrieves it at the door by 8:30 am. On the weekend, however, he Saturday and Sunday mornings. He believes this because during the week (weather permitting) his wakes up anywhere between 7:00 am and noon and often his paper is missing. To test his theory, he decides to start keeping track of the days he wakes up at normal weekday times vs. sleeping in on the weekends and noting whether he has a newspaper that morning. He does this for 40 non-holiday weekends. And finds that on 36 of the 45 days he woke up before 9:00am he had a paper and on 20 of the 35 days he woke up after 9:00am he had a paper. Test at the a= .05 level if the difference in proportions (of days with papers) is different than zero (note that there are 80 days total). Then test whether the sleeping in is independent of the paper being missing. For extra credit, can you determine that sleeping in late is what's causing the paper to be missing?

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.5: Iterative Methods For Solving Linear Systems
Problem 21EQ
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A man living in a large apartment building believes that one of his neighbors is taking his newspaper on paper is always delivered, but he also retrieves it at the door by 8:30 am. On the weekend, however, he Saturday and Sunday mornings. He believes this because during the week (weather permitting) his wakes up anywhere between 7:00 am and noon and often his paper is missing. To test his theory, he decides to start keeping track of the days he wakes up at normal weekday times vs. weekends and noting whether he has a newspaper that morning. He does this for 40 non-holiday weekends. And finds that on 36 of the 45 days he woke up before 9:00am he had a paper and on 20 of sleeping in on the the 35 days he woke up after 9:00am he had a paper. Test at the a= .05 level if the difference in proportions (of days with papers) is different than zero (note that there are 80 days total). Then test whether the sleeping in is independent of the paper being missing. For extra credit, can you determine that sleeping in late is what's causing the paper to be missing?
Transcribed Image Text:A man living in a large apartment building believes that one of his neighbors is taking his newspaper on paper is always delivered, but he also retrieves it at the door by 8:30 am. On the weekend, however, he Saturday and Sunday mornings. He believes this because during the week (weather permitting) his wakes up anywhere between 7:00 am and noon and often his paper is missing. To test his theory, he decides to start keeping track of the days he wakes up at normal weekday times vs. weekends and noting whether he has a newspaper that morning. He does this for 40 non-holiday weekends. And finds that on 36 of the 45 days he woke up before 9:00am he had a paper and on 20 of sleeping in on the the 35 days he woke up after 9:00am he had a paper. Test at the a= .05 level if the difference in proportions (of days with papers) is different than zero (note that there are 80 days total). Then test whether the sleeping in is independent of the paper being missing. For extra credit, can you determine that sleeping in late is what's causing the paper to be missing?
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