Draw a less than and more than Cf-0-10 10-20 20-30 30-40 40-50 50-60
F-3 5 2 1 4 1
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Less than (cf) =3, 8, 10, 11, 15, 16
More than (cf) = 16, 15, 11, 10, 8, 3
Less than cf starts from the first frequency and every next frequency is added to the cf.
More than cf starts from the sum of all frequencies and then every previous frequency is subtracted from the cf.
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