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In a five number summary, which of the following is not used for data summarization?

a. the smallest value
b. the largest value
c. the median
d. the 25th percentile
e. the mean
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Actually its the mean. The 25th percentile is Q1 which is used to calcualte inter-quartile range i.e.

$$IQR = Q_{3} - Q_{1}$$

The mean has nothing to do with the five number summary or box and whisker plot.
by Diamond (74,874 points)
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d) The 25th percentile
by Wooden (230 points)

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