Question

multiple choice
identify the choice that best completes the statement or answers the question.
for questions 1 - 3, use the graph below
time spent by students studying for exam

1. how many students are included in the graphed data?

a. 14 c. 15
b. 6 d. 13

1. how many students could have studied for 7 hours?

a. 1 c. 2
b. 4 d. 6

1. how many students studied 15 hours or less?

a. 0 c. 1
b. 6 d. 13

Explanation:

Step1: Count students for question 1

Sum the frequencies in the bar - graph. $4 + 6+2 + 1=13$

Step2: Analyze for question 2

The bar - graph does not have a separate bar for 7 hours. Since the bar for 6 - 9 hours has a frequency of 2, the number of students who could have studied for 7 hours is 2.

Step3: Analyze for question 3

The graph shows data for students who studied 12 hours or less. Since the highest time value shown is 12 hours, and all the students in the graph are part of the group that studied 15 hours or less (as there is no data for more than 12 hours), the number of students is 13.

Answer:

1. d. 13
2. c. 2
3. d. 13