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Exam 2 Quiz Questions BUAL 2650 questions and answers
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Exam 2 Quiz Questions BUAL 2650 questions and answersExam 2 Quiz Questions BUAL 2650 questions and answersExam 2 Quiz Questions BUAL 2650 questions and answersExam 2 Quiz Questions BUAL 2650 questions and answers

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  • April 15, 2025
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • exam 2 quiz questions bual 2650 questions and answ

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Exam 2 Quiz Questions BUAL 2650 questions
and answers

is it true that regression based on summary data may look better than they really are? - answerstrue
ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne




what is the goal of transforming data?
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a.make the form of a scatterplot more nearly linear ne ne ne ne ne ne ne ne




b.make the spread of several groups more alike ne ne ne ne ne ne ne




c.all of the above ne ne ne




d.make the distribution of a variable more symmetric - answersc.all of the above
ne ne ne ne ne ne ne ne ne ne ne ne




which type of autocorrelation is this testing: If dL < D < dU?
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a.First Order Auto Correlation, negative, not inclusive
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b.First Order Auto Correlation, positive, not inclusive
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c.Second Order Auto Correlation, negative, inclusive ne ne ne ne ne




d.Second Order Auto Correlation, negative, inclusive - answersb.First Order Auto Correlation, ne ne ne ne ne ne ne ne ne ne




positive, inclusive
ne ne




review list on slides ne ne ne




What is the value of a high-leverage point?
ne ne ne ne ne ne ne




a.none of these ne ne




b.they always belong with other data points ne ne ne ne ne ne




c.they can typically stand alone ne ne ne ne




d.they can point to a non-linear relationship - answersd.they can point to a non-linear relationship
ne ne ne ne ne ne ne ne ne ne ne ne ne ne




The farther the new ________ value is from the center of the x values, the _______ trust we should
ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne




place in the predicted value
ne ne ne ne ne




a. x, lessne ne




b.y, more ne




c.x, more ne




d.y,less - answersa.x,less ne ne

, Summaries _______ the impression of the strength of the correlation ne ne ne ne ne ne ne ne ne




a. do not inflate
ne ne ne




b. in no way inflate
ne ne ne ne




c.do inflate - answersc.do inflate
ne ne ne ne




Linear models should not be trusted beyond the span of the ______ values of the data.
ne ne ne ne ne ne ne ne ne ne ne ne ne ne ne




a.x and y ne ne




b.y
c.x - answersc.x
ne ne




Out of the following what could be the unusual and extraordinary observations:
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a.all of the above ne ne ne




b.cases that have both high leverage and large residuals are influential ne ne ne ne ne ne ne ne ne ne




c.cases that are extreme in y have large residuals - answersa.all of the above ne ne ne ne ne ne ne ne ne ne ne ne ne




Testing for positive first-order autocorrelation: If D > dU, is evidence of positive autocorrelation?
ne ne ne ne ne ne ne ne ne ne ne ne ne




a.no, there is no evidence of positive first order autocorrelation
ne ne ne ne ne ne ne ne ne




b.yes, there is evidence of positive first order autocorrelation
ne ne ne ne ne ne ne ne




c.cannot be determined from the information given ne ne ne ne ne ne




d.none of these - answersa.no, there is no evidence of positive first order autocorrelation
ne ne ne ne ne ne ne ne ne ne ne ne ne




Sampling distributions help us make decisions about samples by letting us: ne ne ne ne ne ne ne ne ne ne




a.know whether our sampling was truly random ne ne ne ne ne ne




b.generate all possible outcomes of our hypothesis test ne ne ne ne ne ne ne




c.judge the relative position of a sample statistic compared with a population statistic
ne ne ne ne ne ne ne ne ne ne ne ne




d.remove inaccuracies in our statistic due to random sampling - answersc.judge the relative ne ne ne ne ne ne ne ne ne ne ne ne




position of a sample statistic compared with a population statistic
ne ne ne ne ne ne ne ne ne ne




What does the Linearity Assumption say? ne ne ne ne ne




a.There should be a uni-modal curve to the data ne ne ne ne ne ne ne ne




b.X and Y should be straight. The residuals against x should have no pattern.
ne ne ne ne ne ne ne ne ne ne ne ne ne




c.X and Y should be straight. Residuals against y should have no pattern.
ne ne ne ne ne ne ne ne ne ne ne ne

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