The table below shows the distribution of the heights among 30 people chosen at random. Relative frequency fi 0.0667 Relative cumulative frequency Fi Height Frequency hị Xi [155;160[ [160;165[ [165;170[ [170;175[ [175;180[ [180;185[ [185;190[ Total 2 0.0667 4 0.1333 5 0,1667 0.1667 2 30 a) Account for the column “Relative cumulative frequency, F¡, and complete the missing parts in the table.

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