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.)

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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