Statistics: Quiz: Relative Frequency Histogram

Quiz: Relative Frequency Histogram

Use the histogram below showing the frequency for the number of text messages in one day for a group of 50 students for questions 1 through 5.

1. The first interval is 0 to 4, that is 0 ≤ x < 4. What is the frequency for the interval 4 to 8?

a. 10

b. 12

c. 15

2. What is the relative frequency for the interval 16 to 20?

a. 0.12

b. 0.16

c. 0.24

3. Which interval has a frequency of 8?

a. 0 to 4

b. 4 to 8

c. 12 to 16

4. Which interval has a relative frequency of 0.20?

a. 0 to 4

b. 4 to 8

c. 12 to 16

5. If the histogram were changed to a relative frequency histogram, which of these would change?

a. width of the rectangles

b. scale on the x-axis

c. scale on the y-axis

Use the table below showing the frequencies for the ages of 50 persons attending a dolphin show at the zoo for questions 6 through 9.

6. What is the frequency for 30-40?

a. 0.10

b. 5

c. 28

7. What is the cumulative frequency for 20-30?

a. 6

b. 17

c. 23

8. What is the relative frequency for 40-50?

a. 0.20

b. 0.76

c. 10

9. What is the cumulative relative frequency for 10-20?

a. 0.09

b. 0.18

c. 0.34