Math Exam Worksheet With Answer Key - Math 103/gracey Page 21

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Answer Key
Testname: PRACTICE EXAM 1_FA12
16) C
17) A
18) B
19) A
20) D
21) Trend: Answers will vary. Possible answer: High closing stock values show a decrease from 1990 through 1992, after
which the value of the stock rose through 1998. Another decrease occurred in 1999 and continued through 2001.
y
y
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
x
x
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9 10 11
9 10 11
22) Losses due to employee theft have decreased from 2000 to 2005.
23) The area of the television on the right is nine times (not three times) the area of the television on the left. The graph
gives the visual impression that sales in 2005 were nine times the sales in 1995.
24) A
25) B
26) D
27) B
28) Central air: mean = $66.20; median = $65
Window unit: mean = $71.60; median = $84
Window units appear to be significantly more expensive.
29) C
30) D
31) A
32) A
33) B
34) A
35) B
36) A
37) B
21

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