z = 1.281551
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percentile range is used as a measure of disperson.It is the difference between centile and 10'th percentile.percentile range=p90-p10
Let x be a real number, such that 0 < x < 100. x-th percentile from a sample of n is number k such that k max(i - natural number | i < x.n/100).
If you have the x-th percentile, the index from a sample of size n that corresponds to it is k := max { i - natural | i <= x*n/100 }. Algorithmically, this is to sort the array and take the element k := floor(x*n/100).
Th Roman numeral which represents the number 60 is LX
The -th suffix is used to represent a fraction of a whole.Any digit in the ones place represents wholes, not a fraction of a whole; thus it is the ones and not the oneths place.Because it is to the left of the decimal point.Only the places to the right of the decimal place have the -th suffix which represents a fraction of a whole.The ones place is to the left of the decimal point, so it does not have the -th suffix.