Answer Happy

NAME MAT 126 QUIZ: PART 5C - 1 Proportion Z Test (182) The solution to these problems takes four steps: (1) state the hypotheses, (2) check for ALL conditions (3) analyze sample data - SHOW ALL WORK with formulas & diagrams (4) Interpret results, make a decision and write a concluding statement. Use your T-84 Calculator to verify the P-Value from your calculations to BOTH questions, 1. A CEO claims that 80 percent of the company's 1,000,000 customers are very satisfied. 100 customers are surveyed using simple random sampling. The result: 73 percent are very satisfied. Based on these results, is this convincing evidence that satisfied workers are less than the CEO's claim? Use a significance level of 0.05. 2. A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To test this claim, a random sample of 100 doctors is obtained. Of these 100 doctors, 82 indicate that they recommend aspirin. Does this show evidence that recommending aspirin for patients differs among doctors? Use a = 0.05.