GGR 270 Introductory Analytical Methods
Due Date: October 3rd, IN CLASS
Organization and presentation should be important considerations in preparing your written assignments. This
includes, but is not necessarily limited to, clearly identifying both questions and answers, including titles and
labels for tables and your answers where appropriate. Your written answers should be clear and concise, not
long and drawn out. Preparing your results in a neat and organized manner is an essential requirement on
this and on subsequent assignments. A penalty of 5% per day will apply to late assignments.
The first assignment is designed to provide you with practical experience in descriptive measures of central
tendency (position) and dispersion, and in displaying data graphically.
Section A. Data Description (35)
1. Please refer to the data contained in Table 1. These data measure average individual income for
population over the age of 15, in a sample of neighbourhoods in the City of Toronto (drawn from the 2006
Census). Please undertake the following:
a. Identify the scale of measurement for the Average Income variable, and justify your choice.
b. Compute the following measures:
Measures of Position Measures of Dispersion
i. Mean iii. Range
ii. Median iv. Variance
v. Standard Deviation
(NOTE: You may wish to construct a worksheet to help you in your calculations. While the use
of spreadsheet software is fine for organizing your data, you MUST show enough work to
convince your TA you know how to calculate the measures.
c. Briefly describe the statistical distribution of average annual income across neighbourhoods in
Toronto. Which measure appears more relevant – the mean or median? Why?
Section C. Dat