Statistics- STAT*2060DE F Questions for Assignment #7

STAT*2060DE FQuestions for Assignment #7Assignment #7 is another D2L quiz. All of the calculations are possible by hand, but somemay be lengthy. You may want to carry out some of these procedures on a computer.Excel, S-Plus, R, various other statistical software and web applets can do the calculationsfor you. Chi-square tests are relatively straightforward, but the calculations can becomelong and burdensome.N.B. If you use a computer, DO NOT use Yates’ continuity correction, which is given asan option in many statistical packages (we do not use it in the notes, and we have to allget the same answer)**Give your final answer to at least 3 decimal places where applicable. Carry many decimalplaces throughout your calculations. A little round-off error early can easily compound andresult in an answer that is marked as incorrect**The first 3 questions refer to the following information.Suppose we have patients who were classified according to average number of alcoholicdrinks per week and whether or not they had congestive heart failure. It was found that:Cogestive Heart FailureYesNoTotalsAlcohol ConsumptionAbstainers Less than 7 drinks/week 7 or more drinks/week14610629750590292896696321Test the null hypothesis that alcohol consumption and heart failure are independent, usingthe chi- square test of independence.#1. What is the value of the test statistic? [Hint: It’s somewhere in between 9 and 11]#2. What is the p-value of the appropriate test? Which one of the following best representsthe p-value?A) p-value < .01B) .01 < p-value < .025C) .025 < p-value < .05D) .05 < p-value < .10E) p-value > .10#3. Which one of the following is the best conclusion at α = .05?A) There is significant evidence that alcohol consumption and heart failure are not independent.B) There is significant evidence that alcohol consumption and heart failure are indepen-1square test of independence.#1. What is the value of the test statistic? [Hint: It’s somewhere in between 9 and 11]#2. What is the p-value of the appropriate test?Which one of the following best represdent.C) Therevalue? significant evidence that alcohol consumption and heart failure are notis notA) p-value < .01independent.B) .01 < that there is aD) We can be surep-value < .025 relationship between alcohol consumption and heartfailure. C) .025 < p-value < .05D) .05 < p-value < .10#4. Suppose 500 males were randomly chosen and each was questioned about his occupaE) p-value > .10tion and occupation of his father. It was found:

 

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