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10 Sep 2021, 23:45
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Dropdown 1: 350 and 370
Dropdown 2: Strong Negative
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
55% (02:09) correct
45%
(02:25)
wrong
based on 3689
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In Country X, a building is in Category A if it has a roof height of at least 350 meters. In the graph, each of the 22 Category A buildings is represented by two points arranged vertically: one representing the comparison of the height of the building’s roof to the number of floors (red circles), the other representing the comparison of the height of the building’s roof to the mean height per floor (black squares).
Based on the given information, use the drop-down menus to most accurately complete the following statements about Category A buildings in Country X.
The building with the greatest mean height per floor has a roof height between meters.
There is a correlation between the number of floors and the mean height per floor.
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Official Answer
Dropdown 1: 350 and 370
Dropdown 2: Strong Negative
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29 Sep 2021, 11:07
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Official Explanation
The building with the greatest mean height per floor has a roof height between___________meters.
The building with the greatest mean height per floor is represented by the uppermost black square on the graph. The horizontal coordinate of this square indicates that the roof height of the building is between 350 and 370 meters.
The correct answer is 350 and 370.
There is a____________correlation between the number of floors and the mean height per floor.
Where the red circles are in the upper portions of the graph, the corresponding black squares are generally in the lower regions. Similarly, where the red circles are in the lower portions of the graph, the corresponding black squares are generally in the upper regions. This demonstrates a strong negative correlation between the variable represented by the vertical coordinates of the red circles and the variable represented by the vertical coordinates of the black squares. Thus there is a strong negative correlation between the number of floors and the mean height per floor.
The correct answer is strong negative.
The building with the greatest mean height per floor has a roof height between___________meters.
The building with the greatest mean height per floor is represented by the uppermost black square on the graph. The horizontal coordinate of this square indicates that the roof height of the building is between 350 and 370 meters.
The correct answer is 350 and 370.
There is a____________correlation between the number of floors and the mean height per floor.
Where the red circles are in the upper portions of the graph, the corresponding black squares are generally in the lower regions. Similarly, where the red circles are in the lower portions of the graph, the corresponding black squares are generally in the upper regions. This demonstrates a strong negative correlation between the variable represented by the vertical coordinates of the red circles and the variable represented by the vertical coordinates of the black squares. Thus there is a strong negative correlation between the number of floors and the mean height per floor.
The correct answer is strong negative.
General Discussion
21 Sep 2021, 18:24
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The first blank is relatively easy to answer, the topmost black square lies between the points 350 and 370 on the axis representing heights of roofs.
For the second blank, one could eyeball the graph to see that as the red circles increase in height, the black squares start to descend so a strong negative correlation between the two.
Hope this helps.
For the second blank, one could eyeball the graph to see that as the red circles increase in height, the black squares start to descend so a strong negative correlation between the two.
Hope this helps.
