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Quantative Research Techniques and Statistics
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Quantative Research Techniques and Statistics
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QUANTATIVE RESEARCH TECHNIQUESAND STATISTICS
J
If we believe that the cost of not maintaining a car at regular intervals is higher than the possible lost
costs of maintaining a car at regular intervals, the error we want to avoid is the false conclusion that the
car is maintained at regular intervals, which is______ -
The expected value of perfect information is the same as the _____ - the expected opportunity loss for
the worst alternative
Staticitians can translate p-values into several descriptive terms. Suppose you typically reject H0 at level
0.05. Which of the following statements is incorrect? - If the p-value < 0.01, there is overwhelming
evidence to infer that the alternative hypothesis is false.
Assume EVPI = 50,000 and EMV is $35,000. If perfect information exists, the value of EPPI is - 85000
If we reject the null hypothesis, we conclude that - there is enough statistical evidence to infer that the
alternative hypothesis is true
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 reorders
made by the company, the best sampling strategy would be to use a ____ - stratified random sample
Which of the following probabilities is equal to the significance level of a? - Probability of making a type I
error
denoted by 𝛼, which is also called the significance level
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 _____. - sample variance
In developing an interval estimate for a population mean, a sample of 50 observations was used. The
interval estimate was between 19.76=+ 1.32. Had the sample size been 200 instead of 50, the interval
estimate would have been ______. - 19.76 =+ .66
Which of the following statements is not correct? - If event A does not occur, then the complement of
event A will also not occur.
The collection of all possible outcomes in an experiment is called a - A sample space
If the probability of committing a type I error for a given test is decreased, then for a fixed sample size n,
the probability of committing a type II error - as type one increases, type 2 decreases???
, An example of a classical approach to probability would be ____ - in terms of the proportion of times
that an event can be theoretically expected to occur
When every possible sample with the same number of observations is equally likely to be chosen, the
result is called a - Simple random sample
The primary interest of designing a randomized block experiment is to _____. - Reduce the within-
treatments variation to more easily detect differences among the treatment means.
Though jnot jthe jmost jefficient jmethod, jrolling j4 jdice jenough jtimes jwill jresult jin jtheoretical
jprobabilities jbeing jsimilar jto j- jrelative jfrequencies??
In jone-way, janalysis jof jvariance jbetween jtreatments jvariation jis jmeasured jby jthe j______. j- jSS(Total)
j= jSST+SSE
When jthe jrespondent jindicates jhe jis j25 jyears jold jwhen jhe jis jactually j35 jyears jold, jhe jis jcontributing
jto j____. j- jnon-sampling jerror
Non-sampling jerrors jalso jresult jfrom jthe jsample jobservations jbeing jselected jimproperly. jData
jacquisition
A jwebsite jpoll jis jaccurate j99 jtimes jout jof j100, jwhich jmeans j- j
The j_____ jcan jbe jthe jderivative jof jthe jsampling jdistribution j- jconfidence jinterval jestimator
With ja jlittle jbit jof jalgebra, jthe jconfidence jinterval jestimator jcan jbe jderived jfrom jthe jsampling
jdistribution. j(x̅ j± jzα/2 j(σ/√n))
_________ jstatistics jis ja jbody jof jmethods jused jto jdraw jconclusions jor jinferences jabout
jcharacteristics jof jpopulations jbased jon jsample jdata. j- jinferential
A j___________ jis ja jset jof jdata jdrawn jfrom ja jpopulation. j- jsample
A jdescriptive jmeasure jof ja jpopulation jis ja j___________ jand ja jdescriptive jmeasure jof ja jsample jis ja
j_____________. j- jparamater; jstatistic
The jsimplest jmethod jof jobtaining jdata jis jby j________________ j- jdirect jobservation
________________ jrefers jto jdifferences jbetween jthe jsample jand jthe jpopulation jthat jexists jonly
jbecause jof jthe jobservations jthat jhappened jto jbe jselected jfor jthe jsample. j- jSampling jerror
Which jis ja jmore jserious jerror jbecause jtaking ja jlarger jsample jwon't jdiminish jthe jsize, jor jthe
jpossibility jof joccurrence, jof jthis jerror? j- jnon-sampling
Sampling jPlans j- jA jsimple jrandom jsample jis ja jsample jselected jin jsuch ja jway jthat jevery jpossible
jsample jwith jthe jsame jnumber jof jobservations jis jequally jlikely jto jbe jchosen.
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