Find the value of the 30th percentile of the following set of data.

Mathematics
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Find the value of the 30th percentile of the following set of data.

18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20

a.  19

b.  9

c.  11

d.  20

May 4th, 2015

p30=30(20+1)/100

6.3 rd observation which lies at 7

since it's not 6.5 we don't need to find the average

30th percentile=7


May 4th, 2015

so what's the answer? a b c or d ?

May 4th, 2015

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