Question

3&4

Question 3 Coffee: A popular chain of cafes has been receiving online complaints about Select one answer. one store location. Regular customers complained that the staff at this 10 points location consistently underfill their cups of coffee. The owner of the chain will personally visit the location to meet with the staff to determine if more than 10% of the 16 ounce cups are underfilled by 1 fluid Ounce. She arranges to have "mystery shoppers" visit the store. Mystery shoppers are people who are paid to pose as a regular customer and provide feedback to the owner about customer service. After 100 mystery shop visits, she finds that 18 of the 16 ounce cups of coffee were underfilled. She plans to test the hypotheses H, :p=0.10 versus H, :p > 0.10. What is the test statistic? A. B. C. D. z = 2.67 Z = -2.08 Z = -2.67 Z = 2.08 Question 4 A quality control engineer at a potato chip company tests the bag filling Type numbers in the boxes machine by weighing bags of potato chips. Not every bag contains exactly the 10 points same weight. But if more than 19% of bags are over-filled then they stop production to fix the machine. They define over-filled to be more than 1 ounce above the weight on the package. The engineer weighs 187 bags and finds that 42 of them are over-filled. He plans to test the hypotheses H:p -0.19 versus H.: p > 0.19. What is the test statistic? (Please round your answer to two decimal places if necessary.)

Answer 1

Ha P 0.10 3 VS Ho: P= 0-10 Sample size, n = l00 estimated proportion, p O 8 0.18 0.10 O10(1-0-10) :. Test statistie: PCI-P 2 6666 2.67 option ( A) Hai P0.19 Ho P-0.19 VS sample size, n = 187 4 2 e stimated proporti on, P = 42 187 019 P . Test statistie O-1911-0.19) P(I-P) 87 \ 20604 1. 2 1 (Younded to too decimal places)