BMAL 590 Quantitative Research Techniques and Stat
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BMAL 590 FOUNDATIONS OF QUANTATIVE RESEARCH TECHNIQUES AND STATISTICS
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BMAL 590 Quantitative Research Techniques and Stat
Institution
Liberty University
Review Questions
1. A company has developed a new smartphone whose average lifetime is
unknown. In order to estimate this average, 200 smartphones are randomly
selected from a large production line and tested; their average lifetime is found
to be 5 years. The 200 smartphones represent a blank_...
bmal 590 foundations of quantative research techniques and statistics
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Liberty University
BMAL 590 Quantitative Research Techniques and Stat
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BMAL 590 FOUNDATIONS OF QUANTATIVE RESEARCH TECHNIQUES AND STATISTICS
Review Questions
1. A company has developed a new smartphone whose average lifetime is
unknown. In order to estimate this average, 200 smartphones are randomly
selected from a large production line and tested; their average lifetime is found
to be 5 years. The 200 smartphones represent a blank__________.
o Sample
2. Which of the following is a measure of the reliability of a statistical inference?
o A Significance Level
3. The process of using sample statistics to draw conclusions about population
parameters is called blank__________.
o doing inferential statistics
4. Which of the following statements involve descriptive statistics as opposed to
inferential statistics?
o The Alcohol, Tobacco and Firearms Department reported that Houston
had 1,791 registered gun dealers in 1997.
5. A population of all college applicants exists who have taken the SAT exam in
the United States in the last year. A parameter of the population
are blank__________.
o SAT Scores
6. Which of the following statements is true regarding the design of a good
survey?
o The questions should be kept as short as possible
7. Which method of data collection is involved when a researcher counts and
records the number of students wearing backpacks on campus on a given day?
o Direct observation
8. The manager of the customer service division of a major consumer electronics
company is interested in determining whether the customers who have
purchased a videocassette recorder over the past 12 months are satisfied with
their products. If there are four different brands of videocassette recorders made
by the company, the best sampling strategy would be to use
a blank__________.
o stratified random sample
9. Which of the following types of samples is almost always biased?
o Self-selected samples
10._________ is an expected error based only on the observations limited to a
sample taken from a population.
o sampling error
11.Bayes's Law is used to compute blank__________.
, o posterior probabilities
12.The classical approach describes a probability blank_________.
o in terms of the proportion of times that an event can be theoretically
expected to occur
13.If a set of events includes all the possible outcomes of an experiment, these
events are considered to be blank__________.
o Exhaustive
14.Which of the following statements is not correct?
o If event A does not occur, then its complement A' will also not occur.
15.The blank__________ can determine the union of two events such as event A
and event B.
o addition rule
16.The that allows us to draw conclusions about the population based strictly on
sample data without having any knowledge about the distribution of the
underlying population is blank___________.
o the central limit theorem
17.Each of the following are characteristics of the sampling distribution of the
mean except blank___________.
o if the original population is not normally distributed, the sampling
distribution of the mean will also be approximately normal for large
sample sizes
18.Suppose you are given 3 numbers that relate to the number of people in a
university student sample. The three numbers are 10, 20, and 30. If the standard
deviation is 10, the standard error equals blank__________
o 5.77
19.You are tasked with finding the sample standard deviation. You are given 4
numbers. The numbers are 5, 10, 15, and 20. The sample standard deviation
equals blank__________.
o 6.455
20.Two methods exist to create a sampling distribution. One involves using
parallel samples from a population and the other is to use the blank__________.
o rules of probability
21.The hypothesis of most interest to the researcher is blank__________.
o the alternative hypothesis
22.A Type I error occurs when we blank__________.
o reject a true null hypothesis
23.Statisticians can translate p-values into several descriptive terms. Suppose you
typically reject H0 at level 0.05. Which of the following statements is incorrect?
, o If the p-value < 0.01, there is overwhelming evidence to infer that the
alternative hypothesis is false.
24.In a criminal trial where the null hypothesis states that the defendant is
innocent, a Type I error is made when blank___________.
o an innocent person is found guilty
25.To take advantage of the information of a test result using the rejection region
method and make a better decision on the basis of the amount of statistical
evidence we can analyze the blank__________.
o p-value
26.An unbiased estimator is blank_________.
o a sample statistic, which has an expected value equal to the value of the
population parameter
27.Thirty-six months were randomly sampled and the discount rate on new issues
of 91-day Treasury Bills was collected. The sample mean is 4.76% and the
standard deviation is 171.21. What is the unbiased estimate for the mean of the
population?
o 4.76%
28.A 98% confidence interval estimate for a population mean is determined to be
75.38 to 86.52. If the confidence level is reduced to 90%, the confidence
interval for population mean blank__________.
o becomes narrower
29.Suppose the population of blue whales is 8,000. Researchers are able to garnish
a sample of oceanic movements from 100 blue whales from within this
population. Thus, blank__________.
o researchers can ignore the finite population correction factor
30.In the sample proportion, represented by p = x / n, the variable x refers
to blank__________.
o The number of successes in the sample
31.The distribution of the test statistic for analysis of variance is the
o F-distribution
32.In Fisher's least significant difference (LSD) multiple comparison method, the
LSD value will be the same for all pairs of means if
o all sample sizes are the same
33.One-way ANOVA is applied to three independent samples having means 10, 13,
and 18, respectively. If each observation in the third sample were increased by
30, the value of the F-statistic would
o Increase
, 34.Assume a null hypothesis is found true. By dividing the sum of squares of all
observations or SS(Total) by (n - 1), we can retrieve the blank__________.
o sample variance
35.Which of the following is true about one-way analysis of variance?
o n1 = n2 = … = nk is not required.
36.A tabular presentation that shows the outcome for each decision alternative
under the various states of nature is called a blank__________.
o payoff table
37.Which of the following statements is false regarding the expected monetary
value (EMV)?
o In general, the expected monetary values represent possible payoffs.
38.In the context of an investment decision, blank__________ is the difference
between what the profit for an act is and the potential profit given an optimal
decision.
o an opportunity loss
39.The branches in a decision tree are equivalent to
o events and acts
40.Which of the following is not necessary to compute posterior probabilities?
o EMV
41.Which of the following statements about decision analysis is false?
o Decisions can never be made without the benefit of knowledge gained
from sampling
42.______ can identify when two events are relational
o Conditional probability
43.An approach of assigning probabilities, which assumes that all outcomes of the
experiment are equally likely is referred to as the
o Classical Approach
44.The expected value of perfect information is the same as
o The expected opportunity loss for the best alternative
45. Which of the following is False?
o The EMV decision is always different from the EOL decision
46.A payoff table lists monetary values for each possible combination of the
o Event (state of nature) and act (alternative)
47.When a person receives an email questionnaire and places it in their deleted
items witout responding, they are contributing to_____
o Non-response error
48.The Notion______ represents the probability of B when A has occurred
o P(B/A)
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