NAME _____________________________________________ DATE __________________ PERIOD _________
Lesson 3 Homework Practice
Misleading Graphs and Statistics
ANTIQUES For Exercises 1–3, use the table.
Antiques
1. Find the mean, median, and mode of the data.
Item
mean: $560; median: $750; mode: $850
2. Which measure might be misleading in describing
the value of each item? Explain. Sample answer:
the mode; The mode is significantly higher
than the average.
Value ($)
Desk
150
Table
850
Painting
850
Dishes
750
Sewing Machine
200
3. Which measure would best describe the value of each item? Explain. Sample
answer: the mean; the mean gives an average value for the items.
MOUNTAINS For Exercises 4 and 5, use the graph
Elevation of Mountains
Mt. McKinley is more than twice the elevation
of Mt. St. Elias.
5. Explain how this graph may be misleading. Sample
answer: The elevation on the graph begins
with 16,500 feet, not 0 feet.
20,500
20,000
19,500
19,000
18,500
18,000
17,500
17,000
16,500
Mt. McKinley
Mt. St. Elias
6. BODY TEMPERATURE The graphs below show the hourly body temperature for a hospital
patient. Which graph would be more helpful to the doctor in showing the change in
body temperature? Explain.
Graph A
Hourly Temperatures
Graph B
Hourly Temperatures
110
103
100
102.5
P.
M
.
7
1
P.
M
.
7
P.
M
.
6
P.
M
.
5
P.
M
.
4
P.
M
.
3
P.
M
.
2
P.
M
.
1
Hour
P.
M
.
98
0
6
10
P.
M
.
98.5
P.
M
.
99
20
5
30
100
99.5
P.
M
.
40
4
50
101
100.5
P.
M
.
60
3
70
102
101.5
P.
M
.
80
2
Degrees Fahrenheit
90
Degrees Fahrenheit
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
4. Based on the size of the bars compare the elevations of
the mountains. Sample answer: The elevation of
Elevation (feet)
that shows the elevation of the two highest
mountain peaks in Alaska.
Hour
Graph B; Sample answer: Since body temperature only fluctuates
about 5°F above and below normal body temperature, a smaller
temperature scale better shows the small changes in body temperature.
Course 2 • Chapter 10 Statistics
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