For each problem, select the best response. (a) If the correlation between two v
ID: 3270866 • Letter: F
Question
For each problem, select the best response. (a) If the correlation between two variables is close to 0, you can conclude that a scatterplot would show A. a strong straight-line pattern. B. no straight-line pattern, but there might be a strong pattern of another form. C. a cloud of points with no visible pattern. D. None of the above. (b) 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. (c) What are all the values that a correlation r can possibly take? A. -1 r 1 B. 0 r 1 C. r 0 D. None of the above.
Explanation / Answer
a) If the correlation between two variable is close to 0, you can conclude that a scatterplot would show
Answer:
B.) no straight-line pattern, but there might be a strong pattern of another form.
(b) 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
Answer:
A.) a positive association.
(c) What are all the values that a correlation r can possibly take?
Answer:
A.) -1 r 1
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