State the general equation of computing the i^th quartile, j^th decile and k^th percentile.
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percentile:
n = k / 100 * N,
n = (ordinal) rank of the data that corresponds to the k th percentile, in a sequence or list of N data items. The data items are arranged in increasing order. After calculating n, find the nth item in the data list. If n is a fraction, then take the upper integer.
quartile
quartile means 25 percentile. i th quartile means i * 25 percentile.
n = i * 25 /100 * N = i * N / 4
After finding n, Find n th item in the ordered list of data items. If n is a fraction, take the upper integer.
decile
decile means 10 percentile. j th decile means i * 10 percentile.
n = j * 10 /100 * N = j * N / 10
After finding n, Find n th item in the ordered list of data items. If n is a fraction, take the upper integer.
n = k / 100 * N,
n = (ordinal) rank of the data that corresponds to the k th percentile, in a sequence or list of N data items. The data items are arranged in increasing order. After calculating n, find the nth item in the data list. If n is a fraction, then take the upper integer.
quartile
quartile means 25 percentile. i th quartile means i * 25 percentile.
n = i * 25 /100 * N = i * N / 4
After finding n, Find n th item in the ordered list of data items. If n is a fraction, take the upper integer.
decile
decile means 10 percentile. j th decile means i * 10 percentile.
n = j * 10 /100 * N = j * N / 10
After finding n, Find n th item in the ordered list of data items. If n is a fraction, take the upper integer.
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