QNT 561 Final Exam 4
1) Which of the following measures of central location is affected most by extreme values?
A. Mean
B. Median
C. Mode
D. Geometric mean
2) Which level of measurement is required for the median?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
3) Which level of measureme...
QNT 561 Final Exam 4
1) Which of the following measures of central location is affected most by extreme values?
A. Mean
B. Median
C. Mode
D. Geometric mean
2) Which level of measurement is required for the median?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
3) Which level of measurement is required for the mode?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
4) In a set of observations, which measure of central tendency reports the value that occurs
most often?
A. Mean
B. Median
C. Mode
D. Geometric mean
5) The weighted mean is a special case of what?
A. Mean
B. Median
C. Mode
D. Geometric mean
6) A sample of 5 companies were examined for changes in their relative market share. The
results showed the following increases & decreases: –5, 10, 10, 5, –10.
A. 8
B. 2
C. -2
D. 6
7) The difference between the sample mean & the population mean is called the
A. margin of error
B. population standard deviation
C. standard error of the mean
D. sampling error
, 8) A local trade union consists of plumbers & electricians. Classified according to rank:
Apprentice Journeyman Master Total
Plumbers 25 20 30 75
Electricians 15 40 20 75
40 60 50
A member of the union is selected at random. Given that the person selected is an
electrician, what is the probability that the person is a master?
A. .053
B. .133
C. .500
D. .267
9) Suppose a population consisted of 20 items. How many different samples of n = 3 are
possible?
A. 6840
B. 1140
C. 20
D. 120
10) The mean & the variance are equal in
A. the normal distribution
B. the binomial distribution
C. the Poisson distribution
D. the hypergeometric distribution
11) In the 1936 Presidential Election Franklin D. Roosevelt defeated Alfred E. Landon in a
landslide vote. A Landon victory had been predicted by the Literary Digest, a magazine
that ran the oldest, largest, & most widely publicized of the polls at the time. The Digest's
final prediction was based on 10 million sample ballots mailed to prospective voters, & 2.3
million were returned. The sample of voters was drawn from lists of automobile &
telephone owners. Despite the massive size of this sample, it failed to predict a Roosevelt
victory, being off the mark by 19 percentage points. The Digest was wrong because
A. the sample size, although large, was not large enough
B. the right research questions were not asked
C. respondents intentionally lied about their preferred candidate
D. the sample used was not representative of the actual population at the time
12) In a study on the effect of reinforcement on learning from a company online training
program, two experimental treatments are planned: reinforcement given after every
learning module, or reinforcement given after every two learning modules. Reinforcement
is accomplished with the addition of more examples. Which one of the following control
groups would serve best in this study?
A. A group that does not read any of the learning modules.
B. A group that reads the modules using hardcopy only.
C. A group that reads the learning modules, but does not receive reinforcement.
D. A group that reads the learning modules with random reinforcement.
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