There are many factors that affect a student’s success in school. A professor is concerned that many of her students work at part-time or even full-time jobs while they are attending school. Work responsibilities leave less time available for studying. The professor selects a random sample of her students (her classes are quite large) and organizes the data according to how many hours per week each student works, on average. She then records the final marks for the Microeconomics course these students have just completed. The data are available in MyStatLab. Is there evidence, at a 5% significance level, of an association between marks and the number of hours worked per week? That is, are the mean marks equal? If there are differences in the average marks, discuss what those differences are.
Answer to relevant QuestionsRefer to Exhibit 11.27 above. Fill in the missing values. • The average for each class • The degrees of freedom (Between Groups, Within Groups, and Total) • The mean squares • The F statistic Estimate the p-value of the F statistic you calculated in Exercise 7.At the 5% level of significance, do the data on length of calls suggest that there are differences in the average number of minutes each employee spends ...A random sample of 100 students was taken from four large schools in Montreal. The first language of the students was recorded. The results are shown in Exhibit 12.35 below. Is there evidence, at the 5% significance level, ...John is a small businessman who gets in over his head, incurring debts he cannot pay. In desperation, he turns to the local motorcycle gang to borrow some money to keep his business afloat. He hopes to solve his money ...A random sample of people who regularly attend movies in St. John’s is selected. Each is asked which of several types of movies is his or her favourite. The answers were categorized according to the gender of the survey ...
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