MindTap - ( X Course Her X > Hypothesis X Q Rollin Smok X V Las Vegas H X [ KATH by Circ X IMG-20220 x Q In a multipl X C In 2017, An X C If The Coeff x + X CA @ https:/g.cengage.com/staticb/ui/evo/index.html?deploymentld=5996521885001503578683889386&elSBN=97803571315968... A Q Gu Word T Download and Save... Course Materials DL with TubeOffline Other favorites Nathaniel v CENGAGE |MINDTAP Q Search this course ? X My Home Chapter 11 Assignment Questions Exercise 11.34 Algo (Inferences About Two Population Variances) Question 4 of 10 Courses 2. Hint(s) Check My Work Catalog and Study Tools 3 4. In an effort to make better use of its resources, the New York City Food Bank engaged in lean process improvement. This employee-driven kaizen effort resulted in a new Rental Options method for packing meals for distribution to needy families. One goal of the process improvement effort was to reduce the variability in the meal-packing time. The following 5. College Success Tips table summarizes information from a sample of data using the current method and the new method. Did the kaizen event successfully reduce the population variation? Use 6. a = 0.10 and formulate the appropriate hypothesis test. Career Success Tips 7. V Current Method New Method A-Z ? Help 8. Sample Si 21 = 26 n2 = 21 Give Feedback Sample Variance $7 = 24 10. State the null and alternative hypotheses. Ho : , s Ha : 0; > Calculate the value of the test statistic (to 2 decimals). 51.20 X NJ The p-value is between 0.02 and 0.05 |. Use Table 4 of Appendix B. What is your conclusion? Conclude that the population variances has decreased due to the lean process improvement. Hide Feedback A+ Partially Correct 77.F O 11:40 AM Sunny 5/5/2022 3MindTap - ( X Homework X > Hypothesis x Q Rollin Smok X V Las Vegas H X [ KATH by Circ X IMG-20220 x Q In a multipl X C In 2017, An X C If The Coeff X + X CA @ https:/g.cengage.com/staticb/ui/evo/index.html?deploymentld=5996521885001503578683889386&elSBN=9780357131596&... A Q Gu Word T Download and Save... Course Materials ) DL with TubeOffline Other favorites Nathaniel v CENGAGE |MINDTAP Q Search this course ? X My Home Chapter 11 Assignment Questions Exercise 11.07 Algo (Inferences About a Population Variance) Question 2 of 10 Courses 1. Hint(s) Check My Work Catalog and Study Tools 2 3. In 2017, Americans spent a record-high $9.1 billion on Halloween-related purchases (the balance website). Sample data showing the amount, in dollars, 16 adults spent on a Rental Options Halloween costume are as follows. 4. College Success Tips 13 71 20 61 5. 35 33 33 41 Career Success Tips 6. 55 15 16 99 A-Z 47 32 66 27 ? Help 7. a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? 8. Give Feedback $ 41.50 0 9 b. What is the sample standard deviation (to 2 decimals)? 10. $ 23.78 c. Provide a 95% confidence interval estimate of the population standard deviation for the amount adults spend on a Halloween costume (to 2 decimals). Use Table 11.1. $ Loss IN N Hide Feedback Partially Correct 1 2 Hint(s) Check My Work A+ - Icon Key 77.F 11:40 AM Sunny 5/5/2022 3