D1=P10; D2=P20;D3=P30, and so on. For every one decile you multiply by 10 to get the percentile.
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For a complete definition of Percentile see the related link. A percentile is the value of a variable below which a certain percent of observations fallThe 90th percentile is typically the point at which 10 percent of the highest scores fall.If you assume that scores are out of 40, and that they are evenly distributed (an unlikely event in real life), then the 90th percentile is all scores above 36.
percentile
yes! Since Q1 = P25 Q2=P50 Q3=P75 Similarly, D1=P10 D2=P20 . . . D9=P90 Where, Q1, Q2, Q3 are lower, median and upper quartiles respectively Dn are the deciles Good Luck~! Sehrish
50th percentile or median
Yes, 85th percentile is a passing mark.