For each problem, select the best response. (a) In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gasoline, you expect to see A. a positive association. B. very little association. C. a negative association. D. None of the above.
(a) In a
A. a positive association.
B. very little association.
C. a negative association.
D. None of the above.
(b) If the
A. a cloud of points with no visible pattern.
B. no straight-line pattern, but there might be a strong pattern of another form.
C. a strong straight-line pattern.
D. None of the above.
(c) You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. When you make a scatterplot, the explanatory variable on the x -axis
A. is the price of gasoline.
B. can be either oil price or gasoline price.
C. is the price of oil.
D. None of the above.
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