Qnt 561 final exam

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In this paperwork of QNT 561 Final Exam you will find the
answers on the next questions:
1. A difference between calculating the sample mean and the
population mean is
2. Which of the following measures of central location is
affected most by extreme values?
3. Which level of measurement is required for the median?
4. In which of the following distributions is the probability of
a success usually small?
5. Which of the following is not a requirement of a
probability distribution?
6. Which of the following is not a requirement of a binomial
distribution?
7. A sample
8. The difference between the sample mean and the
population mean is called the
9. Suppose a population consisted of 20 items. How many
different sample of n = 3 are possible?
10. A point estimate is
11. We wish to develop a confidence interval for the
population mean. The population follows the normal
distribution, the standard deviation of the population is 3,
and we have a sample of 10 observations. We decide to use
the 90 percent level of confidence. The appropriate value of
to represent the level of confidence is
12. A confidence interval

2. 13. The Special Rule of Addition is used to combine
14. We use the General Rule of Multiplication to combine
15. An experiment is a
16. Which of the following statements is true regarding a
sample?
17. Which of the following statements is true regarding a
population?
18. A nominal scale variable is
19. In a two-sample test of means for independent samples,
the equal sign always appears in
20. The alternate hypothesis
21. Which of the following is a requirement for a two-sample
test of proportions?
22. In a contingency table
23. To conduct a nonparametric test the
24. In a goodness-of-fit test where the sample size is 200,
there are 5 categories, and the significance level is .05. The
critical value of X2 is
25. A dummy variable or indicator variable
26. The multiple standard error of estimate is
27. A correlation matrix
28) The difference between a random variable and a
probability distribution is:
29) The mean and the variance are equal in
30) Events are independent if
31) Which of the following is a correct statement about a
probability?
32) The ratio scale of measurement
33) In a two-sample test of means for independent samples,
we use the z distribution when
34) Which of the following is not a characteristic of the X2

3. 35) In a multiple regression equation
General Questions - General Academic Questions
QNT/561 Final Exam
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

4. 6) A sample of 5 companies were examined for changes in
their relative market share. The results showed the following
increases and decreases: –5, 10, 10, 5, –10.
A. 8
B. 2
C. -2
D. 6
7) The difference between the sample mean and 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 and 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 are possible?
A. 6840
B. 1140
C. 20

5. D. 120
10) The mean and 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, and 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, and
2.3 million were returned. The sample of voters was drawn
from lists of automobile and 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.

6. 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.
13) The central limit theorem is important to market
researchers because it states that as sample sizes increase,
the distribution of the sample ________ collected from
consumers on any topic of interest being researched
approaches the normal distribution.
A. medians
B. means
C. standard deviations
D. variances
14) To find confidence intervals for the mean of a normal
distribution, the t distribution is usually used in practical
applications instead of the standard normal distribution
because
A. the mean of the population is not known
B. the t distribution is more effective
C. the variance of the population is usually not known
D. the sample size is not known
15) We wish to develop a confidence interval for the
population mean. The population follows the normal
distribution, the standard deviation of the population is 3,
and we have a sample of 10 observations. We decide to use
the 90% level of confidence. The appropriate value of to
represent the level of confidence is
A.
B.
C.

7. D.
16) Which of the following is a correct statement about a
probability?
A. It may range from 0 to 1.
B. It may assume negative values.
C. It may be greater than 1.
D. It cannot be reported to more than 1 decimal pl...
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