Coffee: A popular chain of cafes has been receiving online Select one answer. complaints about one store location. Regular customers complained 10 points that the staff at this 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 I 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 Ho : p = 0.10 versus Hasp > 0.10. What is the test statistic? A. OZ=-2.67 B. Oz = 2.67 C. OZ = 208 D. Z= -208 Question 4 A quality control engineer at a potato chip company tests the bag Type numbers in filling machine by weighing bags of potato chips. Not every bag the boxes contains exactly the same weight. But if more than 19% of bags are 10 points 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 188 bags and finds that 61 of them are over-filled. He plans to test the hypotheses Ho: p = 0.19 versus Ha: p > 0.19. What is the test statistic? (Please round your answer to two decimal places if necessary.) Question 5 Does secondhand smoke increase the risk of a low weight birth? A Select one answer. baby is "low birth weight" if it weighs less than 5.5 pounds at birth. 10 points According to the National Center of Health Statistics, about 7.8% of all babies born in the U.S. are categorized as low birth weight. Researchers randomly select 1200 babies whose mothers had extensive exposure to secondhand smoke during pregnancy, 10.4% of the sample are categorized as low birth weight. Which of the following are the appropriate null and alternative hypotheses for this research question. A. o Ho: P = 0.078; Ha: P # 0.078 B. Ho: P = 0.078; Ha: p > 0.078 C. o Ho: P = 0.104; Ha: P # 0.104 D. HO: H = 0.104; Ha: H > 0.104