Question

can some answer number 30, 35, 36, and 37?

30. A radioactive waste spill occurred in one area of a town. Researchers want to examine whether the spills inked to increased cancer rates. For several months afterwards, they record the number of people diagnosed with cancer at one hospital near the radioactive spill, and different hospitals across town that are not near the spill. What are the two populations of interest? (2 pts) In this case, what is the null hypothesis? (1 pt) What is the alternative/research hypothesis? (1 pt) population #2, hs&4 als that ne n't nCAr the SR11 35. On a standard test of optimism, scores of patients diagnosed with a particular disease are normally distributed with a mean of 20 and a standard deviation of S a. Use the normal curve table to determine the score a patient needs to be included among the top 596, among the top 20%, and among the bottom 10% of optimism scores. (3 pts) b.Illustrate your answer with a sketch. (2 pts) 2x 5 lo 15 2025 3o 35 3 -2 36. On a test of marital intimacy, husbands' scores are normally distributed with a mean of 140 and a standard deviation of 25. A researcher measures 1000 husbands in the Bay Area. a. Using the normal curve approximation rules, approximately how many of these husbands will have scores above 190, below 165, and below 115? (3 pts) b. Ilustrate your answer with a sketch. (2 pts) 165 140 o5 35 00 S 7. A nutritionist wants to determine whether people who regularly drink one protein shake per day have lower cholesterol than people in general. In the general population, cholesterol is normally distributed with -190 and ơ-30. A person who has followed the protein shake regimen for two months is randomly selected, and his cholesterol is 135. Test this hypothesis at the p .01 significance level, using the five steps of hypothesis testing. (10 pts) taue ihe Pretn seke Population 1: Realie ho Null Hypothesis: that there vs be Research/Alternative Hypothesis: Is a one-tailed ortwo-tailed test appropriate? Why? a big ftoren Draw the comparson distribution, noting the M, SD, cutoff and sample Z scores. Shade in the critical regjon. Cutoff/Critical Zscore: Sample Z score What is yout conclusion? How do you interpret the results of this hypothesis test? le

Answer 1

Sol: 3 Top -) b= 24.20 .b Using e sefwe