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statistics professor wants to ﬁnd out the average GPA (grade point average) for all students at UMKC. Heuses all students enrolled in his statistics class as a sample and collects information on their GPAs to ﬁnd theaverage GPA.(a) Identify the (statistical) population and (statistical) sample.(b) Is this a random sample or nonrandom sample?(c) What kind of sample is it? In other words, is it a simple random sample, a convenient sample, or ajudgement sample?Suppose another statistics professor at UMKC obtains a list of all students enrolled at UMKC from theregistrar’s oﬃce and then selects 150 students at random from this list using a statistical software packagesuch as Minitab. Then she collects information on their GPA also through the database of registrar’soﬃce and ﬁnds another average GPA.(d) Is this a random sample or nonrandom sample?(e) What kind of sample is it? In other words, is it a simple random sample, a convenient sample, or ajudgement sample? (Read the material on the back)(f) Which of the average GPA, the one estimated by him or by her, is more representative to the population’sGPA? Explains
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