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Exam 1 Review
Statistics 110, Fall 2009
Notes
±
Exam 1 will be administered on Tuesday, September 22.
±
The exam will cover Chapters 1 – 8.
Review all concepts, problems, and homework
assignments from these chapters.
The review problems presented below are from a previous
semester and may not cover all of the material that will be on the exam.
Materials Needed
±
Calculator
±
Number 2 pencil (scantrons will be used to record your responses)
Correct Answers
Problem
Answer
1
C
2
C
3
C
4
A
5
C
6
B
7
C
8
A
9
C
10
D
11
B
12
A
13
B
14
B
15
C
16
C
17
B
18
A
19
A
20
B
21
D
22
C
23
B
24
C
25
C
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View Full DocumentExam 1 Review
Statistics 110, Fall 2009
Review Problems
1.
A factory worker always adds five extra hours to her time card each week.
In terms of the true number of
hours she works each week, her measurement is
A)
Invalid
B)
Unreliable
C)
Biased
D)
Confounded
2.
You decide to measure the morality of an individual by using the number of hours the individual spends in
church each week.
A critic says that this is an inappropriate technique because many very moral people
don’t go to church.
The critic is saying your measurement is
A)
Biased
B)
Unreliable
C)
Invalid
D)
Confounded
3.
Below is data on the number of students who took math courses and the number who failed these courses at a
local high school.
Course
Number who Failed
Number who took the Course
Algebra
20
200
Geometry
11
130
Trigonometry
17
100
Calculus
9
60
Which math course had the highest number of students who failed relative to the number who took the
course?
A)
Algebra
B)
Geometry
C)
Trigonometry
D)
Calculus
4.
In planning for an expansion of its sewage treatment facility, a large city wants to estimate the percentage of
city homes that have an insink garbage disposal.
Eight hundred and eighty (880) homes were surveyed, and
35% (308) were found to have insink disposals.
The margin of error at the 95% confidence level is
%
4
.
3
±
.
Select the appropriate confidence statement about the percent of homes in the city with an insink garbage
disposal.
A)
We are 95% confident that between 31.6% and 38.4% of all homes in the city have an insink
garbage disposal.
B)
We are 95% confident that between 20% and 40% of all homes in the city have an insink
garbage disposal.
C)
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 Fall '07
 JOHNSON
 Statistics

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