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If a change in variable X causes a change in variable Y, variable Xis called the A.) dependent variable B.) explanatory variable C.) independent variable D.) both B and C In the equation \" Y = Bo + BiX + U " Bo is the an Bi is the A.) error term, slope B.) error term, intercept C.) intercept, slope D.) none of the above In a simple linear regression equation, if X increases by 5: A.) Y increases by Bi B.) Y increases by 5 * (Bo + Bi) C.) Y increases by Bi/C') D.) none of the above As the sample size increases, the variance of the sample mean A.) increases B.) decreases C.) stays constant D.) not enough info to know A negative covariant between X and Y implies that A.) as X increases, Y increases B.) there is no linear relationship between X and Y C.) l