MSM07G7_RESBK_Ch7_003-011.pe
2/10/06
12:20 PM
Page 4
Name
LESSON
Date
Class
Practice B
7-1 Frequency Tables, Stem-and-Leaf Plots, and Line Plots
The table shows the heights of students in Ms. Blaire’s class.
Use the table for Exercises 1 and 2.
Height (in.)
Males
60, 45, 48, 57, 62, 59, 57, 60, 56, 58, 61, 52, 55
Females
49, 52, 56, 48, 51, 60, 47, 53, 55, 58, 54
1. Make a cumulative frequency table of the data.
Heights of Students
Height (in.)
Frequency
Cumulative
Frequency
45–49
50–54
55–59
60–64
5
5
9
5
5
10
19
24
2. How many of the students were less than 60 in tall?
19
3. Make a stem-and-leaf plot of the data.
Height of Students
Stem
Leaves
4
5
6
5 7 8 8 9
1 2 2 3 4 5 5 6 6 7 7 8 8 9
0 0 0 1 2
Key: 5 冷 2 means 52
4. How many of the students were less than 50 in tall?
5
5. Make a line plot of the data.
44
46
48
50
52
54
56
6. Which height occurred the greatest number of times?
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4
58
60
62
64
60 in.
Holt Mathematics
Practice B
7-1 Frequency Tables, Stem-and-Leaf Plots, and Line Plots
Practice A
7-1 Frequency Tables, Stem-and-Leaf Plots, and Line Plots
LESSON
LESSON
The table shows the heights of students in Ms. Blaire’s class.
Use the table for Exercises 1 and 2.
The table shows normal monthly temperatures for Tampa,
Florida, for each month of the year.
Height (in.)
Normal Monthly Temperatures in Tampa
Month
January February March April
Temp. (°F)
61
Month
July
August
Temp. (°F)
83
83
63
67
June
78
82
72
September October
82
May
November
December
69
63
76
Frequency
Cumulative
Frequency
5
3
4
5
8
12
70-79
80-89
Females
49, 52, 56, 48, 51, 60, 47, 53, 55, 58, 54
Heights of Students
Normal Monthly Temperatures in Tampa
60-69
60, 45, 48, 57, 62, 59, 57, 60, 56, 58, 61, 52, 55
1. Make a cumulative frequency table of the data.
1. Complete the cumulative frequency table for the data.
Temperature (°F)
Males
Height (in.)
Frequency
Cumulative
Frequency
45–49
50–54
55–59
60–64
5
5
9
5
5
10
19
24
2. How many of the students were less than 60 in tall?
8
2. How many months had a normal temperature of less than 80°?
Height of Students
Stem
3. Complete a stem-and-leaf plot of the data.
6
7
8
Key: 6
Leaves
4
5
6
Normal Monthly Temperatures in Tampa
Stems
19
3. Make a stem-and-leaf plot of the data.
Leaves
13379
268
2233
5 7 8 8 9
1 2 2 3 4 5 5 6 6 7 7 8 8 9
0 0 0 1 2
Key: 5 2 means 52
4. How many of the students were less than 50 in tall?
5
5. Make a line plot of the data.
I 1 means 61
5
4. How many months had a normal temperature in the 60s?
5. Complete a line plot of the data.
44
60
62
64
66
68
70
72
74
76
78
80
3
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All rights reserved.
82
48
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65
Holt Mathematics
Step 3: Add the values to find the cumulative frequency. Write the
number in the last column.
Pulse Rates
Pulse Rate
Frequency
Cumulative Frequency
intervals of 10
60–69
3
3
70–79
4
437
80–89
4
4 7 11
90–99
1
1 11 12
70
1. The list below shows the highest
temperatures (°F) ever recorded
in all the states that begin with the
letters M or N in the United States.
Use the data to complete the
cumulative frequency table.
105°, 109°, 107°, 112°, 114°, 115°,
118°, 117°, 118°, 125°, 106°, 110°,
122°, 108°, 110°, 121°
Leaves
a. class sizes in a middle school
5
1122345688
b. speeds in miles per hour of cars on
a highway
6
0000418
7
12
c. number of hours worked in a week by
part-time employees of Toy Town
60 in.
4
the sum of the frequency column is
equal to the last number in the cumulative
frequency column.
the number of students with
pulse rates between 80 and 89
Stems
64
You can use the data to make a cumulative frequency table.
Here’s how.
Step 1: Choose an interval. Each interval must be the same size. Often, 5
or 10 is a good interval length. Write the intervals in the first column.
Step 2: Find the number of values in each interval. Write the number in
the middle column.
9
5. Which of the following is the most likely source
of the data in the stem-and-leaf plot? Explain
your answer.
62
The list shows the pulse rate of 12 students.
65, 63, 72, 88, 90, 82, 80, 75, 68, 72, 74, 84
3. Make a line plot of the data.
60
60
A cumulative frequency table includes a running total of the
frequencies of all the previous groups.
2. Make a stem-and-leaf plot of the
data.
55
58
A frequency table organizes data into groups.
Ages of Twentieth Century Presidents Ages of Twentieth Century Presidents
Stems Leaves
Cumulative
Ages
Frequency
Frequency
4 236
5 111245566
40-44
2
2
6 01249
45-49
1
3
50-54
5
8
Key: 4 I 6 means 46
55-59
4
12
60-64
4
16
65-69
1
17
50
56
Reteach
7-1 Frequency Tables, Stem-and-Leaf Plots, and Line Plots
42, 51, 56, 55, 51, 54, 51, 60, 62, 43, 55, 56, 61, 52, 69, 64, 46
45
54
LESSON
The list below shows the ages of all the presidents inaugurated
in the twentieth century.
40
52
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Practice C
7-1 Frequency Tables, Stem-and-Leaf Plots, and Line Plots
4. How many of these presidents were
in their 50s when they took office?
50
6. Which height occurred the greatest number of times?
84
LESSON
1. Make a cumulative frequency table of
the data.
46
Key: 5 I 8 means 58
Possible answer: b; Cars on a highway could be traveling between 51 and 72 miles per hour. Classes
Highest Temperatures in M and N States
Temperature
Cumulative
(°F)
Frequency
Frequency
105–109
5
5
110–114
115–119
120–124
4
4
2
1
9
13
15
16
125–129
probably would not have 51-72 students, and part-time employees would not be working that many hours.
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
5
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
Holt Mathematics
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
86
6
Holt Mathematics
Holt Mathematics