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.. DO = 25.5 + Gol 7 9 DO = 25.5 + 4.67 Do = 30.17 Therefore, 60% of the group of students have less than 30.17 reactions. The Percentiles for Grouped Data Percentiles divide the distribution into one hundred equal parts. To find the percentiles, we first need to determine the percentile classes. The Pre class is the class interval where the (M) data is contained. Next, in computing for Pk the following formula is used. th KN 100 KN 100 ---** - cf, where: LB = lower boundary of the Pk class N = total frequency cfo = less than cumulative frequency of the class before the Pk class fple = frequency of the Ple class Pk = LB + i fPk --- இவை ...
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