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Cambridge IGCSE Statistics practice

Paper 1 structured question: Index numbers

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Index numbers

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Paper 1Statistical Techniques3 marks

A price index is calculated for three goods with the following prices and weights representing their expenditure shares.

Data Table

Price and Weight Data

Prices and weights for goods X, Y, and Z

GoodPriceWeight
X1200.4
Y800.35
Z1000.25
  1. a

    Calculate the weighted aggregate price index using the given data.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 1 structured question: Index numbers

Paper 1Statistical Techniques3 marks

Data Table

Production Data

Quantities and weights for products A, B, and C

ProductQuantityWeight
A1000.5
B1500.3
C2000.2
  1. a

    Calculate the weighted aggregate index number for the quantities produced using the given weights.

    Aim for approximately 3 distinct marking points.

    [3]