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-On a recent Statistics test, the scores were 61, 66, 68 , 82, 84, 86, 88, 90, 92, and 97. Find the 10% trimmed mean of this data.
A)82
B)77
C)38.5
D)85

Question

Quizplus · Accepted Answer

To find the 10% trimmed mean, you remove the lowest 10% and the highest 10% of the data. With 10 data points, 10% is 1 data point from each end. Remove the lowest (61) and the highest (97), leaving 66, 68, 82, 84, 86, 88, 90, 92. The mean of these numbers is 82.

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