WAEC - Mathematics (2016 - No. 44)

Find the lower quartile of the distribution illustrated by the cumulative frequency curve
17.5
19.0
27.5
28.0

Explanation

Lower quartile,

Q1 = \(\frac{1}{4}\)Nth term

= \(\frac{1}{4}\) x 600th term

= 150th term

= 15.5 + 3 + 0.5

= 19

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