K: 2018 Spr K: 2018 Spring.Be 4.1 Scatter Diagrams Linear Correlation: Problem 1
ID: 3066513 • Letter: K
Question
K: 2018 Spr K: 2018 Spring.Be 4.1 Scatter Diagrams Linear Correlation: Problem 1 (1 point) For each problem, select the best response. (a) What are all the values that a correlation r can possibiy take? OA.Kr1 O D. None of the above. (b) You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of scatterplot, the explanatory variable on the x -axis OA.S the price of gasoline. o B. is the price of oil. O C. can be either oil price or gasoline price. D. None of the above. (c) If the correlation between two variables is close to 0, you can conclude that a scatterplot would show OA. a cloud of points with no visible pattern. OB. no straight-line pattern, but there might be a strong pattern of another form. O D. None of the above. Note:Explanation / Answer
1. A) the correlation coefficient can take values from -1 and 1 inclusive
2. C) it can be either of them
3. B) if the data has correlation coefficient of 1, it means it follows a straight line
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