Arranging them in ascending order
15,20,25,25,27,28,30,34
Percentile 12.5% = 15
Percentile 25% = 20
Percentile 37.5% = 25
Percentile 50% = 25
Percentile 62.5% = 27
Percentile 75% = 28
Percentile 87.5% = 30
Percentile 100% = 34
Percentile 19% (19%*8=1.72) = 20
Percentile 24% (24%*8=1.92) = 20
Percentile 60% (60%*8=4.80) = 27
Percentile 70% (70%*8=5.6) = 28
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