After that cheese and wine, your weighted index will be ~20 stone... Another formula here which, guess what, you need to learn off by heart. Once you have, take a stab at these...
1) In 2018, the publishing company above spent £20 on cheese, £325 on wine, £35 on biscuits and £25 on crisps.
Use these values and the table in the example to find the weighted index number for 2018 with the base year 2014.
2) CPI is a chain based index number. The table shows the annual percentage
2017
change in CPI for a number of years.
% change
a) Calculate the chain based index numbers missing from the table.
Index
b) Regina's water bill is linked to this index. Her annual bill for 2015
Source: Ofice for National Statistic
was £444. Determine what her bill was for 2017.
Year
2015
2016
0.0%
0.72
2.7%