The number of credits in business courses that eight job app

The number of credits in business courses that eight job applicants that is shown below. What value corresponds 10 the 40^th percentile?

Solution

The set of given values is {9,12,15,27,33,43,63} (in ascending order)

The 40th percentile point is that value below which 40% of the observations lie.

Here total number of observation is 7 whose 40% is 7*40% = 2.8

3rd value in the ascending order is that value below which 2.8 observations lie.

Hence the 40th percentile point= 3rd value = 15