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Question

The following box plot shows the number of donut stalls at two carnivals over a week. Does Carnival B have significantly more donut stalls than Carnival A? Explain.


A
The data sets cannot be compared, as they have different IQR.
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B
Yes, because the ratio of the difference in the medians to the IQR is greater than 2.
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C
No, because the ratio of the difference in the medians to the IQR is less than 2.
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D
Yes, because the ratio of the difference in the medians to the IQR is equal to 2.
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Solution

The correct option is A The data sets cannot be compared, as they have different IQR.
Carnival A
Median: 56
Lower quartile: 46
Upper quartile: 72
Interquartile range: 7246=26

Carnival B
Median: 94
Lower quartile: 80
Upper quartile: 100
Interquartile range: 10080=20

Since the IQR of both the data sets are different, we cannot compare them.

Therefore, the correct answer is option D.

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