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Question: The box-and-whisker plot shows the earnings (in dollars) of a daily wage earner. Find the interquartile range.



A ) 150
B ) 200
C ) 100
D ) 300

Steps to derive

1 The interquartile range is the difference between the upper quartile and the lower quartile.

2 From the given box and whisker plot, the upper quartile is 300 and the lower quartile is 100.

3 Interquartile range = upper quartile - lower quartile
3 = 300 - 100 = 200

4 So, the interquartile range for the given box and whisker plot is 200.



Hence the right answer is Option B

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