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Using the information from the last question about Izzy and Hannah: 1. Write a pair of null and alternative hypotheses. 2. In this context describe a Type I error and the impact such an error would have on customer's wait times. 3. In this context describe a Type II error and the impact such an error would have on the store. 4. Conduct an appropriate test of significance to test management's claim 5. Your job is to write a paragraph using plain English to advise Hannaford's whether this reduction in wait times was statistically significant. Avoid statistical vocabulary. Management does not want to read about p-values for example.

Using the information from the last question about Izzy and Hannah: 1. Write a pair of null and alternative hypotheses. 2. In this context describe a Type I error and the impact such an error would have on customer's wait times. 3. In this context describe a Type II error and the impact such an error would have on the store. 4. Conduct an appropriate test of significance to test management's claim 5. Your job is to write a paragraph using plain English to advise Hannaford's whether this reduction in wait times was statistically significant. Avoid statistical vocabulary. Management does not want to read about p-values for example.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 23PPS
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Last Spring, a couple of my Oxbow students, Izzy and Hannah, studied the how long it took customers at Hannafords to get through a self-checkout line compared to waiting through the Quick Checkout (12 items or less) register. Hannafords' management claims the mean wait time for the self-checkout is less than the established mean wait time of 4.7 minutes using the Quick Checkout line. They allowed the sisters to do some data collection, perform a statistical analysis on their results and report back to them about what they found. Management is interested in increasing the number of self-checkout registers if there is evidence that the registers decrease customers wait times. They will not need as many people working register and save in payroll costs. Hannah and Izzy collected data during three 5pm - 5:30pm times on random days. The results from 40 customers had a mean wait time of 4.4 minutes with a standard deviation of 0.6 minute. Keep this information for use in the next problem. For this part of the exercise, what is the sample size "n" for their sample? 40
Transcribed Image Text:Last Spring, a couple of my Oxbow students, Izzy and Hannah, studied the how long it took customers at Hannafords to get through a self-checkout line compared to waiting through the Quick Checkout (12 items or less) register. Hannafords' management claims the mean wait time for the self-checkout is less than the established mean wait time of 4.7 minutes using the Quick Checkout line. They allowed the sisters to do some data collection, perform a statistical analysis on their results and report back to them about what they found. Management is interested in increasing the number of self-checkout registers if there is evidence that the registers decrease customers wait times. They will not need as many people working register and save in payroll costs. Hannah and Izzy collected data during three 5pm - 5:30pm times on random days. The results from 40 customers had a mean wait time of 4.4 minutes with a standard deviation of 0.6 minute. Keep this information for use in the next problem. For this part of the exercise, what is the sample size "n" for their sample? 40
Using the information from the last question about Izzy and Hannah: 1. Write a pair of null and alternative hypotheses. 2. In this context describe a Type I error and the impact such an error would have on customer's wait times. 3. In this context describe a Type Il error and the impact such an error would have on the store. 4. Conduct an appropriate test of significance to test management's claim 5. Your job is to write a paragraph using plain English to advise Hannaford's whether this reduction in wait times was statistically significant. Avoid statistical vocabulary. Management does not want to read about p-values for example.
Transcribed Image Text:Using the information from the last question about Izzy and Hannah: 1. Write a pair of null and alternative hypotheses. 2. In this context describe a Type I error and the impact such an error would have on customer's wait times. 3. In this context describe a Type Il error and the impact such an error would have on the store. 4. Conduct an appropriate test of significance to test management's claim 5. Your job is to write a paragraph using plain English to advise Hannaford's whether this reduction in wait times was statistically significant. Avoid statistical vocabulary. Management does not want to read about p-values for example.
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