The report “Undergraduate Students and Credit Cards in 2004” (Nellie Mae, May 2005) included information collected from individuals in a random sample of undergraduate students in the United States. Students were classified according to region of residence and whether or not they have one or more credit cards, resulting in the accompanying two-way table. Carry out a test to determine if there is evidence that region of residence and having a credit card are not independent. Use a = .05.
Answer to relevant QuestionsThe report described in the previous exercise also classified students according to region of residence and whether or not they had a credit card with a balance of more than $7000. Do these data support the conclusion that ...The paper “Pistachio Nut Consumption and Serum Lipid Levels” (Journal of the American College of Nutrition : 141–148) describes a study to determine if eating pistachio nuts can have an effect on blood ...Let x be the size of a house (in square feet) and y be the amount of natural gas used (therms) during a specified period. Suppose that for a particular community, x and y are related according to the simple linear regression ...An experiment to study the relationship between x = time spent exercising (minutes) and y 5 amount of oxygen consumed during the exercise period resulted in the following summary statistics. a. Estimate the slope and y ...The article “Effect of Temperature on the pH of Skim Milk” (Journal of Dairy Research : 277– 280) reported on a study involving x = temperature (8C) under specified experimental conditions and y = milk pH. The ...
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