The frequency distribution of the weight of 100 participants in a high jump competition is as shown below : Weight (kg) 20 - 29 30 - 39 40 - 49 50 - 59 60 -...

The frequency distribution of the weight of 100 participants in a high jump competition is as shown below :

(a) Construct the cumulative frequency table.

(b) Draw the cumulative frequency curve.

(c) From the curve, estimate the : (i) median ; (ii) semi- interquartile range ; (iii) probability that a participant chosen at random weighs at least 60 kg.