Download 1 Which of the following statistics is not a measure of central

Name: __________________
1
b. median
b. the interquartile range
b. 23.
c. the arithmetic mean
d. the first quartile
d. 171.
c. the median
b. The standard deviation
equals 0.
d. the interquartile range
c. The coefficient of variation
equals 0.
d. All of these
choices.
The length of the box in the box-and-whisker plot portrays the:
b. interquartile range.
c. range.
d. third quartile.
Which descriptive summary measures are considered to be resistant statistics to outliers?
a. the mean and
standard deviation
9
d. It is equal to the mode in bellshaped "normal" distributions.
Which of the following statements is true regarding the data set 8, 8, 8, 8, and 8?
a. median.
8
c. 29.
b. the variance
a. The range
equals 0.
7
c. It is equal
to Q2 .
Which of the following is not a measure of variability?
a. the range
6
b. It is a measure of
central tendency.
A sample of 20 observations has a standard deviation of 3. The sum of the squared deviations from the sample mean is:
a. 20.
5
d. interquartile range
Which of the following summary measures is sensitive to extreme values?
a. the median
4
c. mode
Which of the following statements about the median is not true?
a. It is more affected by
extreme values than the
mean.
3
Date: _____________
Which of the following statistics is not a measure of central tendency?
a. mean
2
Class:
b. the interquartile range
and range
c. the mode and
variance
d. the median and
interquartile range
The difference between a sample mean and the population mean is called:
a. nonresponse error.
b. selection bias.
c. sampling error.
d. nonsampling error.
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.
PAGE 1
Name: __________________
Class:
Date: _____________
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.
PAGE 2
ANSWER KEY
Lueker Summer2008 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