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Exam 1 Review Answers (For problems 1 and 2). Below is part of a database for college students. 1. 4 pts. In our terminology, age is what kind of variable? a. categorical variable b. numeric variable *c. quantitative variable It is also a numeric variable but that is not a term we used. 2. 4 pts. Which measure would be most appropriate for summarizing the “Class” information? a. Average b. Total *c. Percents We would compute percent of students who are freshmen, percent who are sophomores, etc. 3. 4 pts. To the right is a database of gender and age for 4 individuals. What Excel or Calc function gives the median of the ages? a. =MID(C2:C5) b. =MED(AGE) *c. =MEDIAN(C2:C5)

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(For problems 4 5) The histogram to the right shows exam scores for 33 students. 4 . 4 pts. What percent of the students have exam scores that are 70 90? pct = 48.5% (6 + 10)/33 = .485 5. 4 pts. Which of the following is true? a. The median is 80 or less. b. The median is 80 or greater.
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• Fall '08
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