The distribution of the weights of two-month-old piglets is shown in the grouped frequency table below. Weight (kg) Frequency Cumulative frequency 1.2-1.3 8 1.3-1.4 28 1.4-1.5 32 1.5-1.6 22 a Write down the class boundaries for the third group. b Work out the mid-point of the second group.

AppendixLO1