Download 1. answer: d source: objective: 1 Which of the following statistics is

Name: __________________
1.
answer: d
source:
objective:
2.
answer: a
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objective:
3.
answer: c
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4.
answer: d
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5.
Class:
Date: _____________
1 Which of the following statistics is not a measure of central tendency?
a. mean
b. median
c. mode
d. interquartile range
2 Which of the following statements about the median is not true?
a. It is more affected by extreme
values than the mean.
c. It is equal to Q2 .
b. It is a measure of central tendency.
d. It is equal to the mode in bell-shaped
"normal" distributions.
3 Which of the following summary measures is sensitive to extreme values?
a. the
median
b. the interquartile
range
c. the arithmetic
mean
4 A sample of 20 observations has a standard deviation of 3. The sum of the squared deviations
from the sample mean is:
a. 20.
b. 23.
c. 29.
d. 171.
5 Which of the following is not a measure of variability?
answer: c
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objective:
6.
answer: d
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objective:
7.
answer: b
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8.
answer: d
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objective:
9.
answer: c
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PAGE 1
d. the first
quartile
a. the range
b. the variance
c. the median
d. the interquartile
range
6 Which of the following statements is true regarding the data set 8, 8, 8, 8, and 8?
a. The range equals 0.
c. The coefficient of variation equals 0.
b. The standard deviation equals 0.
d. All of these choices.
7 The length of the box in the box-and-whisker plot portrays the:
a. median.
b. interquartile range.
c. range.
d. third quartile.
8 Which descriptive summary measures are considered to be resistant statistics to outliers?
a. the mean and standard deviation
c. the mode and variance
b. the interquartile range and range
d. the median and interquartile range
9 The difference between a sample mean and the population mean is called:
a. nonresponse
error.
b. selection
bias.
c. sampling
error.
d. nonsampling
error.
Name: __________________
10.
answer: False
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11.
answer: True
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12.
answer: True
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PAGE 2
Class:
Date: _____________
10 True-False.
The simple random sample involves dividing the population into groups, then randomly selecting
some of the groups and taking a simple random sample of their members.
11 True-False.
A person receives a mail questionnaire and places it in the wastebasket. This exhibits the
characteristic of nonresponse error (or bias).
12 True-False.
In a simple random sample, each individual has the same chance of selection on every draw.
ANSWER KEY
Lueker Spring2008 HW2
1. d
2. a
3. c
ANSWER KEY - Page 1
4. d
5. c
6. d
7. b
8. d
9. c
10. False
11. True
12. True