Cigarette Smoking A Researcher Found That A Cigarette Smoker Smokes On Average 32 Cigarettes A Day She Feels That This 1 (28.47 KiB) Viewed 13 times
Cigarette Smoking A Researcher Found That A Cigarette Smoker Smokes On Average 32 Cigarettes A Day She Feels That This 2 (24.43 KiB) Viewed 13 times
Cigarette Smoking A researcher found that a cigarette smoker smokes on average 32 cigarettes a day. She feels that this average is too high. She selected a random sample of 9 smokers and found that the mean number of cigarettes they smoked per day was 29. The sample standard deviation was 2.9. At a-0.01, is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part: 0 / 5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho: 1 not claim H₁:1 not claim This hypothesis test is a two-tailed Part: 1/5 Part 2 of 5 test. On H 0-0 X 0>D D< (b) Find the critical value(s). Round the answer to three decimal places. If there is more than one critical value, seperate them with commas. Critical value(s): 1
(c) Compute the test value. Always round I score values to three decimal places. IM Part: 3/5 Part 4 of 5 (d) Make the decision. Do not reject the null hypothesis. Part: 4/5 X Part 5 of 5 (e) Summarize the results. There is enough evidence to support the claim that the mean number of cigarettes smoked per day is less than 32. X
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