# The histogram shows the test scores of 30 students as recorded in the table.

Question 1

“Find the area of the regular polygon. Round your answer to the nearest hundredth.” (It is a regular nonagon, side length is 6.84 units, and the radius is 10 units.)

Question 2

Histograms Name ______________________________

1. Histograms are used to display information where the data is shown in

groups called intervals.

Example:

The histogram shows the test scores of 30 students as recorded in the table.

100 72 55 89 88 95 92 68 84 75

70 85 80 100 58 78 87 88 74 73

93 78 64 79 79 84 94 75 82 64

Observations:

The graph peaks at the 71–80 interval. More students scored in this range.

Only 2 students scored between 51 and 60.

The graph is approximately symmetric.

Questions:

1. How many students scored in the 91-100 interval? ________

2. How many students scored in the 61-70 interval? __________

3. What percent of the students scored 91-100? _______

2

4

6

8

10

12

51-60 61-70 71-80 81-90 91-100

Test Scores Report

Test Scores

Number of Students

Copyright © 2014 Hilda Ratliff

2. Mrs. Green gives swimming lessons. The histogram represents the

number of students in each age group.

1. How many of her students are 6-8 years old? ____________________

2. What is the overall shape of the graph?

a) approximately symmetric b) skewed right c) skewed left

3. Where does the graph peak? ________________

4. How many students does Mrs. Green teach? ___________

5. What percent of her students is 0-5 years old? ___________

1

2

3

4

5

6

7

8

9

10

0-2 3-5 6-8 9-11

Mrs. Green’s Students

Age (Years)

Number of Students

Copyright © 2014 Hilda Ratliff

Independent Practice

1.

1. The overall shape of this graph is

________________________ .

2. How many plants were 5-6 inches

tall at the end of the experiment?

_______________

2.

1. The graph peaks for which

interval? ______________

2. How many students are

represented in the histogram?

__________________

3.

1. The overall shape for this graph is

_______________________ .

2. What percent of the total students

who participated in the sale sold

21-25 candy bars?

4.

1. How many players scored points in

November? __________

2. What percent of the total players

scored 31-40 points in November?

Plant Height Experiment

1

2

3

4

5

Number of plants

1-2 3-4 5-6 7-8

Number of Inches

2

4

6

8

10

12

Video Games Owned by Students

Number of Students

Number of Games

0-2 3-5 6-8 9-11 12-14

Candy Bars Sold by Students

Number of Students

12

10

8

6

4

2

0-5 6-10 11-15 16-20 21-25

Number of Candy Bars

Points Scored – Basketball Team

November

1

2

3

4

5

Number of players

11-20 21-30 31-40 41-50

Number of Points