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qmb 3250 exam 2 questions with correct solutions
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qmb 3250 exam 2 questions with correct solutions
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qmb 3250 exam 2 questions with correctsolutions
In simple linear regression, what kind of predictor do we use for our response variable? -
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ANSWER: ➡ quantitative
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Which of the following is NOT a goal of simple linear regression (SLR)? - ANSWER: ➡ To
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determine if the coefficient of determination (R2) is 100%.
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In the simple linear regression model, what do we use to estimate β1? - ANSWER: ➡ b1
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In Multiple Regression with k coefficients, what null hypothesis (H0), does the ANOVA F-test
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try to determine? - ANSWER: ➡ Ho: β1 = β2= β3 . . . .= βk= 0
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It is thought that the number of cans damaged in a boxcar shipment (Y ) of cans is a function of
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the speed of the boxcar (X) at impact. Thirteen(13) boxcars selected at random were used to
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examine whether this appeared to be true. b1 = 11.841
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What would be the appropriate null and alternate hypothesis for this experiment? - ANSWER:
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➡ Ho: β1 = 0 Ha: β1 ≠ 0
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Which of the following should be done when you see that a residual plot has a distinct funnel
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shape? - ANSWER: ➡ take the natural log of one or both variables
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Which of the following is not an assumption of simple linear regression? - ANSWER: ➡ Errors
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must have a standard deviation of 1.
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The head coach of the Miami Heat was interested in seeing if there was a linear relationship
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between the height of a basketball player and how many points they scored. He took a random
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sample of 20 different players and the points they averaged over last season. Which of these
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