Respuesta :
In the given set of data, the third quartile is 38
Determining the quartiles of a given data
From the question, we are to determine the third quartile of the given data.
The third quartile, also known as the upper quartile, is the value under which 75% of data points are found when arranged in increasing order.
The given data set is
21 , 24 , 25 , 28, 29, 35, 37, 39, 42
The third quartile will be the average of 37 and 39
Third quartile = (37+39)/2
Third quartile = 76/2
Third quartile = 38
Hence, in the given set of data, the third quartile is 38.
Learn more on Calculating quartiles of a data set here: https://brainly.com/question/18723655
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