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
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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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)
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