The grouped frequency table shows the age (a years) at which a sample of 100 women had their first child. Age of Women Frequency (a years)

(f) Mid-point (x) y = *-2* x-14 11-21 11 21-27 24 27-31 27 31-37 26 37-43 12 a Copy and complete the table b Use the coding y their first child. x-14 2 to calculate an estimate of the mean age at which women have their first child.

AppendixLO1