(a) T F In a scatterplot, the response is shown on the horizontal axis with the

Question

(a) T F In a scatterplot, the response is shown on the horizontal axis with the explanatory (b) T F If no data points deviate from a single line with nonzero slope, then the r2 of the fitted (c) T F If the correlation between the explanatory variable and the response variable is 0.9, (d) T F In simple linear regression, the correlation coefficient and the sample slope always (e) T F The use of simple linear regression to describe the association between price and sales variable on the vertical axis. regression model is 1. (Assume the values of the explanatory variable are not identical). then those two variables must be linearly related. have the same sign (i.e. both are positive or both are negative). implies equal differences in predicted sales when comparing periods with prices $10 and $11 and periods with prices $20 and $21.

Explanation / Answer

Solution:-

a) False

b) True.

c) True => r ranges from -1 to +1

d) True

e) True

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