Question

Construct a boxplot for the following data: 8.5, 14, 71, 77, 78, 89, 100, 124, 136,...

Construct a boxplot for the following data: 8.5, 14, 71, 77, 78, 89, 100, 124, 136, 150.
What is the third quartile?

Math   Statistics-And-Probability   
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Answer #1

The third quartile (or upper quartile or 75th percentile) is the median of the upper half of the numbers. So, to find the third quartile, we need to place the numbers in value order and find the upper half.

8.5   14   71   77   78   89   100   124   136   150   

So, the upper half is

89   100   124   136   150   

The median of these numbers is 124.

Third quartile = 124

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