All questions please a)Draw a cumulative frequency graph of this distribution b)Estimate the median and the interquartile range of the amount spent. c)Estimate the number of shoppers who spent more...

All questions please

a)Draw a cumulative frequency graph of this distribution

b)Estimate the median and the interquartile range of the amount spent.

c)Estimate the number of shoppers who spent more than $115

d)Calculate an estimate of the mean amount spent

Extracted text: The amounts spent by 160 shoppers at a supermarket are summarised in the following table. Jumlah yang dibelanjakan/ Amount spent ($x) Bilangan pembeli/ Number of shoppers 0 <>< 30="" 30=""><>< 50="" 50=""><>< 70="" 70=""><>< 90="" 90=""><>< 140="" 16="" 40="" 48="" 26="">