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A professional employee in a large corporation receives an avera μ=42.1 e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they return to their tasks. In an effort to reduce distraction caused by such interruptions, one company established a priority list that all employees were to use before sending an e-mail. One month after the new priority list was put into place, a random sample of 48 employees showed that they were receiving an average of x=33.1 e-mails per day. The computer server through which the e-mails are routed showed that a=19.6. Use a 5% level of significance to test the claim that there has been a change (either way) in the average number of e-mails received per day per employee. What are the null and alternate hypotheses? O Ho: O Ho: O Ho: O Ho: O Ho: 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails: H₁: < 42.1 e-mails

A professional employee in a large corporation receives an avera μ=42.1 e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they return to their tasks. In an effort to reduce distraction caused by such interruptions, one company established a priority list that all employees were to use before sending an e-mail. One month after the new priority list was put into place, a random sample of 48 employees showed that they were receiving an average of x=33.1 e-mails per day. The computer server through which the e-mails are routed showed that a=19.6. Use a 5% level of significance to test the claim that there has been a change (either way) in the average number of e-mails received per day per employee. What are the null and alternate hypotheses? O Ho: O Ho: O Ho: O Ho: O Ho: 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails: H₁: < 42.1 e-mails

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
Section2.4: Applications
Problem 28EQ
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A professional employee in a large corporation receives an average of μ=42.1 e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they return to their tasks. In an effort to reduce distraction caused by such interruptions, one company established a priority list that all employees were to use before sending an e-mail. One month after the new priority list was put into place, a random sample of 48 employees showed that they were receiving an average of x = 33.1 e-mails per day. The computer server through which the e-mails are routed showed that a=19.6. Use a 5% level of significance to test the claim that there has been a change (either way) in the average number of e-mails received per day per employee. What are the null and alternate hypotheses? O Ho: O Ho: O Ho: O Ho: O Ho: 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u = 42.1 e-mails 42.1 e-mails; H₁: μ< 42.1 e-mails
Transcribed Image Text:A professional employee in a large corporation receives an average of μ=42.1 e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they return to their tasks. In an effort to reduce distraction caused by such interruptions, one company established a priority list that all employees were to use before sending an e-mail. One month after the new priority list was put into place, a random sample of 48 employees showed that they were receiving an average of x = 33.1 e-mails per day. The computer server through which the e-mails are routed showed that a=19.6. Use a 5% level of significance to test the claim that there has been a change (either way) in the average number of e-mails received per day per employee. What are the null and alternate hypotheses? O Ho: O Ho: O Ho: O Ho: O Ho: 42.1 e-mails; H₁: u 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u> 42.1 e-mails 42.1 e-mails; H₁: u = 42.1 e-mails 42.1 e-mails; H₁: μ< 42.1 e-mails
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