Asked by Connexus Learner

Consider the following dataset: 22. 29. 31. 30, 22, 24, 18, 20, 25. What is the third quartile's value? Round to the nearest tenth if necessary.

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Answered by GPT 3.5
To find the third quartile (Q3), we first need to arrange the data in ascending order:

18, 20, 22, 22, 24, 25, 29, 30, 31

Since there are 9 data points, the position of Q3 is given by (3/4)(n+1) = (3/4)(9+1) = (3/4)(10) = 7.5.

This means that the third quartile falls between the 7th and 8th values in the ordered dataset. To find the exact value, we take the average of these two values:

Q3 = (25 + 29) / 2 = 27

Therefore, the third quartile's value is 27.

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