A study is conducted for students taking a statistics class. Several variables are recorded in the survey. The...

A study is conducted for students taking a statistics class. Several variables are recorded in the survey. The 300 students were asked what type of car the student owns, the number of credit hours taken during that semester, the time the student waited in line at the bookstore to pay for his/her textbooks, and the home state of the students.

1. Which of the following plots would be appropriate to graph the 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, a sedan, or a sports car. If the surveyors wanted to explore the relationship between type of car and the time the student waited in line at the bookstore, what plot would be most appropriate?

bar graph, histogram, scatter plot, or side-by-side boxplot

3. The mean number of credits taken during the semester by 300 surveyed 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 all students at Pitt is known to follow a Normal distribution with mean 14 and standard deviation 3. Based on the 68-95-99.7 rule, what proportion of students take more than 17 credits?

2.5%, 16%, 32%, or 95%

Solutions

Expert Solution

orchestra answered 11 months ago

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