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Question: Students in a class were asked whether they preferred an in-class or a take-home final exam and were then categorized as to whether or not they had received an A on the in class midterm. Of the 25 A students, 10 preferred a take home exam, while of the 50 non-A students, 30 preferred a take-home exam.
a. Display the data in a contingency table.
b. In the relationship between grade on the midterm and opinion about type of final, which variable is the response variable and which is the explanatory variable?
c. Determine an appropriate set of conditional percentages for determining whether there is a relationship between grade on the midterm and opinion about the type of final. Based on these percentages, does it appear that there is a relationship? Why or why not?
The means of two normally distributed populations, where the unknown population variances are assumed to not be equal. What is the upper confidence limit is?
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Hallmark would like to test the hypothesis that those celebrating Valentine's Day will spend more than an average of $125 on gifts. A random sample of 18 people celebrating Valentine's Day spent an average of $148.50 with a standard deviation of $..
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