To find the third quartile value, we need to first arrange the data in ascending order:
18, 20, 22, 22, 24, 25, 29, 30, 31
To find the third quartile, we need to determine the position of the value in the dataset. Since there are 9 values in the dataset, the third quartile position can be calculated as:
Q3 = (3/4)(n+1) = (3/4)(9+1) = 7.5
Since 7.5 is not a whole number, we take the average of the values in the 7th and 8th positions:
(25 + 29) / 2 = 27
Therefore, the third quartile value is 27.
Consider the following dataset: 22, 29, 31, 30, 22, 24, 18, 20, 25. What is the third quartiles value? Round to the nearest tenth if necessary.
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