The table gives information about the cost of the same basket of groceries in 2010, in 2011 and in 2012.
| 2010 | 2011 | 2012 | |
|---|---|---|---|
| Index number (base year 2009) | 102.1 | 103.5 | 105.8 |
In 2009, the cost of the basket of groceries was £25.99.
Work out the cost of the basket of groceries in 2012.
The table gives information about the annual cost of gas for households in the UK in 2009, 2010, 2011 and 2012.
| 2009 | 2010 | 2011 | 2012 | |
|---|---|---|---|---|
| Annual Cost (£) | 980 | 1120 | 1080 | 1260 |
Using 2009 as the base year, complete the table by calculating the index number for the year 2012. Give your answer correct to one decimal place.
The table gives information about the average selling price of a new car over a period of five months. The table also gives some of the chain base index numbers, correct to 1 decimal place, for this information.
| April | May | June | July | August | |
|---|---|---|---|---|---|
| Average price (£) | 28 624 | 28 777 | 28 860 | 28 973 | 29 132 |
| Chain base index number | 100.5 | 100.3 |
Explain what the value 100.3 in the table represents.
Calculate, to 1 decimal place, the chain base index numbers for July and August, and write them in the table.
The table gives information about the cost of stationery for a company each year from 2012 to 2014.
| Year | 2011 | 2012 | 2013 | 2014 |
|---|---|---|---|---|
| Chain base index number | 104.1 | 105.2 | 103.9 |
The cost of stationery in 2011 was £670.
Work out the cost of stationery
(i) in 2012,
(ii) in 2013.
The table gives information about the cost per ounce, in £, of gold in January 2012, in January 2013, in January 2014 and in January 2015.
| Year | 2012 | 2013 | 2014 | 2015 |
|---|---|---|---|---|
| Cost per ounce (£) | 910 | 1020 | 1170 | 1540 |
| Chain base index number |
Calculate the chain base index numbers for the years 2013, 2014 and 2015 and write them in the table. Give each value correct to one decimal place.
Calculate the geometric mean of the chain base for the years 2013, 2014 and 2015. Give your answer correct to one decimal place.
Give an interpretation of your answer to part (b).
The value of jewellery changes every year. The table shows the value, in pounds, of a ring for the years 2009 to 2012.
| Year | 2009 | 2010 | 2011 | 2012 |
|---|---|---|---|---|
| Value | £105 | £120 | £125 | £140 |
Calculate the chain base index number for 2010, 2011 and 2012. Give each value correct to 3 significant figures.
James insures his house in January each year. The table gives the cost to insure his house in 2010 and in 2011.
| Year | 2010 | 2011 |
|---|---|---|
| Cost (£) | 236 | 278 |
Using 2010 as the base year, work out the index number for the cost of the house insurance in 2011. Give your answer correct to 1 decimal place.
The following table shows the value of a house in Ockendon for the years 1990 and 1991.
Ockendon
| Year | 1990 | 1991 |
|---|---|---|
| Value (£) | £80 000 | £88 000 |
Taking 1990 as the base year, work out the value of the house in Ockendon in 1991 as an index number.
Using 1990 as the base year, the value of a house in Tilbury in 1991 as an index number is 108.5. Interpret and compare the index numbers for Ockendon and Tilbury in 1991.
The following table shows the share price, in pence, of Mathcom in 2012 in 2013.
| Year | 2012 | 2013 |
|---|---|---|
| Share Price (in pence) | 1196 | 1263 |
Taking 2012 as the base year, work out the index number for the share price of Mathcom in 2013. Give your answer correct to 1 decimal place.
Using 2012 as the base year, the index number for the share price of Statcom in 2013 is 109.3. Interpret and compare the index numbers for Mathcom and Statcom in 2013.
Practise Edexcel GCSE Statistics Index Numbers with exam-style questions for Foundation and Higher tier. 9 questions, matched to the Edexcel GCSE Statistics (1ST0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.