A nursery is recording the heights of its available fruit trees. Which of the following displays could be used to represent the data, and why?

Bar chart, because tree height is numerical
Box plot, because tree height is numerical
Histogram, because tree height is categorical
Stem-and-leaf-plot, because tree height is categorical
Question 13(Multiple Choice Worth 1 points)
(Two-Way Frequency Tables MC)

Students at a virtual school are allowed to sign up for one math class each year. The numbers of students signing up for various math classes for the next school year are given in the following table:


Grade Geometry Algebra II Pre-Calculus AP Statistics Total
10th 20.7% 10.3% 3.4% 0.7% 35.2%
11th 6.7% 13.8% 10.3% 2.8% 33.8%
12th 1.4% 6.7% 13.8% 9% 31%
Total 29% 31% 27.6% 12.4% 1


A student calculated the joint relative frequency of 10th grade students in geometry as being 71.4%. What did the student actually calculate, and what is the correct answer?
The student calculated the conditional relative frequency for students who are in 10th grade, given that they are enrolled in Geometry. The correct value of the joint relative frequency of 10th grade students in geometry is 20.7%.
The student calculated the conditional relative frequency for students who are in 10th grade, given that they are enrolled in Geometry. The correct value of the joint relative frequency of 10th grade students in geometry is 29%.
The student calculated the marginal relative frequency for 10th grade students in geometry. The correct value of the joint relative frequency of 10th grade students in geometry is 20.7%.
The student calculated the marginal relative frequency for 10th grade students in geometry. The correct value of the joint relative frequency of 10th grade students in geometry is 29%.
Question 14(Multiple Choice Worth 1 points)
(Linear Functions Fit to Data LC)

Data were collected on the distance a baseball will travel when hit by a baseball bat at a certain speed. The speed, s, is measured in miles per hour, and distance, y, is measured in yards. The line of fit is given by ŷ = 3.98 + 53.59s.

If the ball travels for a duration of 5 seconds, what is the predicted distance of the ball?

267.95 yards
271.93 yards
283.87 yards
287.85 yards
Question 15(Multiple Choice Worth 1 points)
(Linear Functions Fit to Data MC)

A data set comparing a woman's shoe size to her height is represented by the table.


Shoe Size Height (inches)
7.5 63
8 70.5
12 68
7 71
9 69.5
10 70
12 75
12.5 63
14 72


Using technology, calculate the line of best fit. Identify and interpret the slope in this scenario.
The slope of the line of best fit is 0.25. Each time the shoe size increases by one, the height increases by 0.25 inches.
The slope of the line of best fit is 0.25. Each time the shoe size increases by 0.25, the height increases by one inch.
The slope of the line of best fit is 66.6. Each time the shoe size increases by one, the height increases by 66.6 inches.
The slope of the line of best fit is 66.6. Each time the shoe size increases by 66.6, the height increases by one inch.
You must check the box below prior to submitting your exam!

Check this box to indicate you are ready to submit your exam
FDK391.12