If variables have a linear relationship then which of these could be true:A)Ther

If variables have a linear relationship then which of these could be true:A)There could be a cause and effect relationship between the two variablesB)There could be no cause/effect just a statistical relationship between the two variablesC)When the valuable of one variable goes up the value of the other variable goes upD)When the one variable of variable goes down the value of the other goes downE)All of the aboveWe want to test the effect that GPA might have on grades in a class. What is the dependent variableA)GPAB)The gradesC)RegressionD)CoefficientWe want to test whether GPA has a linear effect on grades in the class.Which of these is an appropriate statistical analytical model?A)Multiple regressionB)Simple Linear RegressionC)Double moving averageD)Exponential SmoothingThe coefficient of determination in a regression model:A)Tells us the percentage of variability in the dependent variable accounted for by the independent variableB)Is represented by R-squaredC)Is always some value between 0 and 1D)All of the aboveSuppose we analyzed the effect of GPA on grades in a class and found the results to have an R-squared value of 0.53.What do we know?a)Fifty-three percent of the variability in class grades is attributable to GPAb)There are other factors (besides GPT) that account for 47% of grades in the classc)Neither A or Bd)Both A and B
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