A study is conducted for students taking a statisticsclass.  Several variables are recorded in thesurvey.  The 300 students were asked what type of car thestudent owns, the number of credit hours taken during thatsemester, the time the student waited in line at the bookstore topay for his/her textbooks, and the home state of thestudents. Â
1. Which of the following plots would be appropriate to graphthe home states of the students?
bar graph, histogram, scatter plot, or side-by-side boxplot
2. The type of car a student owned was classified as an SUV, asedan, or a sports car.  If the surveyors wanted toexplore the relationship between type of car and the time thestudent waited in line at the bookstore, what plot would be mostappropriate?
bar graph, histogram, scatter plot, or side-by-side boxplot
3. The mean number of credits taken during the semester by 300surveyed students was 15.  The number 15
| | is a statistic labeled X |
| | is a statistic labeled μ |
| | is a parameter labeled X |
| | is a parameter labeled μ |
4. The number of credits taken during the semester for allstudents at Pitt is known to follow a Normal distribution with mean14 and standard deviation 3. Based on the 68-95-99.7 rule, whatproportion of students take more than 17 credits?
2.5%, 16%, 32%, or 95%
