1.3 Statistical Methods

• Methods of analysing statistical data in Geography
• Measures of dispersion: range, variance and standard deviation
• Frequency distribution and cumulative frequency
• Presenting data using compound and cumulative bar graphs
• Presenting data using proportional circles
• Presenting data using divided rectangles and divided bars
• Interpreting statistical data in geographical studies
• Using statistical analysis in planning

• explore methods of analysing statistical data in Geography
• examine ways of presenting statistical data for interpretation
• calculate the range, variance and standard deviation for geographical data
• interpret statistical data in geographical studies
• appreciate the analysis of statistical data in planning

“How is data analysis useful in planning?”

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1. Analysing geographical data
   40 min · 1 practice tasks · quiz
   Introduce statistical methods and why geographers analyse data.
2. Types and sources of geographical data
   40 min · 1 practice tasks · quiz
   Classify data as primary or secondary and as quantitative or qualitative.
3. Frequency distribution
   40 min · 1 practice tasks · quiz
   Organise data into a frequency table and work out cumulative frequency.
4. Measures of dispersion: range
   40 min · 1 practice tasks · quiz
   Use the range to describe the spread of geographical data.
5. Measures of dispersion: variance
   40 min · 1 practice tasks · quiz
   Calculate variance as the mean of the squared deviations.
6. Measures of dispersion: standard deviation
   40 min · 1 practice tasks · quiz
   Find and interpret the standard deviation of geographical data.
7. Compound and cumulative bar graphs
   40 min · 1 practice tasks · quiz
   Draw and read compound and cumulative bar graphs.
8. Presenting data with proportional circles
   40 min · 1 practice tasks · quiz
   Draw proportional circles so that circle area matches the value.
9. Divided rectangles and divided bars
   40 min · 1 practice tasks · quiz
   Use divided bars to compare the composition of totals.
10. Interpreting statistical data for planning
    40 min · 1 practice tasks · quiz
    Read graphs and tables critically and use them in planning.