Chapter3InClassExampleExpanded_Answers

Chapter3InClassExampleExpanded_Answers - One thousand...

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uni0043uni0068uni0061uni0070uni0074uni0065uni0072uni0033uni003A uni0049uni006E-uni0043uni006Cuni0061uni0073uni0073uni0045uni0078uni0061uni006Duni0070uni006Cuni0065 One thousand students at a city high school were classified both according to GPA and whether or not they consistently skipped classes. The table reflects the information. Address parts (a) – (d). Show work and/or explain; otherwise no credit will be given. You do NOT have to answer these questions with English sentences. (a) What percentage of the students have a GPA between 2.0 and 3.0 (inclusive)? (b) What percentage of the students have a GPA under 2.0 and have consistently skipped classes? (c) What percentage of the students have a GPA under 2.0 or have consistently skipped classes? (d) What percentage of the students have a GPA under 2.0 given that they consistently skipped classes? Suppose the categorical variables x and y are defined as follows: x represents student’s gpa range, and so its three possible “values” are GPA < 2.0, GPA is 2.0 – 3.0, and GPA > 3.0 y
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