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b) 95% percent of the population has changed their HDL after eating raw garlic six days a week for sixmonths.c) The study used a method that gives a results within 6 mg/dl of the truth about the population in 95% ofall samples.d) We could be certain that the study result is within 6 mg/dl of the truth about the population if theconditions for inferences were satisfied.e) We can be certain that the study results is within 6 mg/dl of the truth about the population.Question 6Your answer is CORRECT.Suppose you wish to perform a hypothesis test for a population mean. Suppose that the population standarddeviation is unknown, the population is skewed to the right, and the sample is large. Would you perform a z-test or t-test?a) The t-test is appropriate.b) The z-test is appropriate.c) Either test is appropriate.d) Neither test is appropriate.Question 7Your answer is CORRECT.In a random sample of 220 men (18 or older), 135 are married. Construct a 93% confidence interval toestimate the true proportion of married men (18 or older).a) (0.554, 0.662)b) (0.581, 0.646)c) (0.554, 0.673)
11/19/2017Print Test4/7d) (0.565, 0.662)e) None of the above.Question 8Your answer is INCORRECT.A sample of 31 boxes of cereal has a sample standard deviation of 0.81 ounces. Construct a 93% confidenceinterval to estimate the true standard deviation of the filling process for the boxes of cereal.a) (0.433, 1.120)b) (0.658, 1.058)c) (0.525, 1.095)d) (0.731, 0.731)e) None of the above.Question 9Your answer is INCORRECT.A pizza delivery company claims that its average delivery time is less than 45 minutes. If any driver that hasa mean of less than 45 minutes gets a bonus in their paycheck. One driver did get that bonus but really hismean delivery time was 55 minutes. This is an example ofa) Type I errorb) Type II errorc) Type III errord) Correct decisione) Free pizzaQuestion 10Your answer is INCORRECT.