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For question 2, provide: a. Null and alternate hypotheses, level of significance, and left-tail, right-tail or two- tailed test. b. What sampling distribution will you use? What is the critical value of zo? c. Sketch the critical region and show the critical value. d. Calculate the z value corresponding to the sample statistic and show its location on the sketch in part c. e. Based on your answers, shall we reject or fail to reject the null hypothesis at the given level of significance? Explain. 2.) According to the Wall Street Journal, a professional employee working in a large company receives an average of 31.8 calls per day. Most of the calls are from other employees in the company. Because of the large number of calls, 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 lit" that employees were to use before making phone calls. One month after the new priorities were put into use, a random sample of 63 employees showed they were receiving an average of 28.5 calls per day with a sample standard deviation of 10.7 calls per day. Use a 1% level of significance to test the claim that there has been a change (either way) in the average number of calls ner day received Ua

For question 2, provide: a. Null and alternate hypotheses, level of significance, and left-tail, right-tail or two- tailed test. b. What sampling distribution will you use? What is the critical value of zo? c. Sketch the critical region and show the critical value. d. Calculate the z value corresponding to the sample statistic and show its location on the sketch in part c. e. Based on your answers, shall we reject or fail to reject the null hypothesis at the given level of significance? Explain. 2.) According to the Wall Street Journal, a professional employee working in a large company receives an average of 31.8 calls per day. Most of the calls are from other employees in the company. Because of the large number of calls, 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 lit" that employees were to use before making phone calls. One month after the new priorities were put into use, a random sample of 63 employees showed they were receiving an average of 28.5 calls per day with a sample standard deviation of 10.7 calls per day. Use a 1% level of significance to test the claim that there has been a change (either way) in the average number of calls ner day received Ua

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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For question 2, provide: a. Null and alternate hypotheses, level of significance, and left-tail, right-tail or two- tailed test. b. What sampling distribution will you use? What is the critical value of zo? c. Sketch the critical region and show the critical value. d. Calculate the z value corresponding to the sample statistic and show its location on the sketch in part c. e. Based on your answers, shall we reject or fail to reject the null hypothesis at the given level of significance? Explain. 2.) According to the Wall Street Journal, a professional employee working in a large company receives an average of 31.8 calls per day. Most of the calls are from other employees in the company. Because of the large number of calls, 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 lit" that employees were to use before making phone calls. One month after the new priorities were put into use, a random sample of 63 employees showed they were receiving an average of 28.5 calls per day with a sample standard deviation of 10.7 calls per day. Use a 1% level of significance to test the claim that there has been a change (either way) in the average number of calls per day received. (Use o = 10.7) %24 % & 3 6 8 9. e d k V b C n m
Transcribed Image Text:For question 2, provide: a. Null and alternate hypotheses, level of significance, and left-tail, right-tail or two- tailed test. b. What sampling distribution will you use? What is the critical value of zo? c. Sketch the critical region and show the critical value. d. Calculate the z value corresponding to the sample statistic and show its location on the sketch in part c. e. Based on your answers, shall we reject or fail to reject the null hypothesis at the given level of significance? Explain. 2.) According to the Wall Street Journal, a professional employee working in a large company receives an average of 31.8 calls per day. Most of the calls are from other employees in the company. Because of the large number of calls, 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 lit" that employees were to use before making phone calls. One month after the new priorities were put into use, a random sample of 63 employees showed they were receiving an average of 28.5 calls per day with a sample standard deviation of 10.7 calls per day. Use a 1% level of significance to test the claim that there has been a change (either way) in the average number of calls per day received. (Use o = 10.7) %24 % & 3 6 8 9. e d k V b C n m
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