The data used is from a statistical software Minitab; London.MPJ is the file that consists of 1519 households drawn from 1980 - 1982 British Family Expenditure Surveys. Data that is selected is only of households that have one or two children living in Greater London. The self employed and retired households have been excluded.  The subset of data is obtained from a larger study.

The variables from the London.MPJ file:

• wfood = budget share for food expenditure
• wfuel = budget share for fuel expenditure
• wcloth = budget share for clothing expenditure
• walc = budget share for alcohol expenditure
• wtrans = budget share for transport expenditure
• wother = budget share for other good expenditure
• totexp = total household expenditure (rounded to the nearest 10 UK pounds sterling)
• income = total net household income (rounded to the nearest 10 UK pounds sterling)
• age = age of household head
• nk = number of children

The variables that are used for this regression investigation are the following:

• wfood as dependent variable (Y)
• totexp as independent variable (X)
• income as independent variable (X)
• age as independent variable (X)
• nk as independent variable (X)