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{1.75, 1.63, 1.55, 1.92, 1.81, 1.79, 1.81}. Determine the mean, the median, and the 20th percentile?

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Mean = (1.75 + 1.63 + 1.55 + 1.92 + 1.81 + 1.79 + 1.81) / 7 = 1.751

Median = Arrange the values in ascending order, if the total number of values in data set is odd the middle value is median

1.55, 1.63, 1.75, 1.79, 1.81, 1.81, 1.92

Percentile = 1.55, 1.63, 1.75, 1.79, 1.81, 1.81, 1.92

A = (nk)/100 

= (7 x 20)/100 = 1.4

=> 2nd value in data set, which is 1.63

 

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