Psychology, G541, Data Analysis Revision Notes

  • suggest appropriate descriptive statistic/graphical representations of data (no inferential statistics required for this unit)
  • draw conclusions from data/graphs
  • sketch summary tables/graphs
  • identify and describe the differences between qualitative and quantitative data
  • suggest appropriate descriptive statistics for data in source material (mean, median, mode)
  • sketch appropriate summary tables/graphs from data in source material (bar charts, scattergraphs
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AS Psychology - G541 Psychological Investigations Revision Notes
Data Analysis
Specification Reference:
3.1 The data produced by a piece of research
Candidates should be able to:
· suggest appropriate descriptive statistic/graphical representations of data (no inferential
statistics required for this unit)
· draw conclusions from data/graphs
· sketch summary tables/graphs
· identify and describe the differences between qualitative and quantitative data
· suggest appropriate descriptive statistics for data in source material (mean, median, mode)
· sketch appropriate summary tables/graphs from data in source material (bar charts,
scattergraphs)
Data Types:
Quantitative Qualitative
· Numerical value · Not numerical value, `describes'
+Easy to analyse, can perform statistical tests +Represents complexity of human behvaiour
+Easy to detect patterns and produces neat +Provides rich detail
conclusions
-Over simplifies reality -More difficult to detect patterns or reach
conclusions
-No insight, lacks detail -Subjective
Graphs and Charts:
1. HISTOGRAMS - used with continuous data, requires frequency density
2. BAR CHARTS - shows frequency data, quantitative data
3. SCATTERGRAPH - used with continuous data, shows correlation
Descriptive Statistics:
Measures of central Mean Add values, divide by +Makes use of all data
tendency number of values
-Misrepresentative if
extreme values
Median Middle value in ordered +Not affected by extreme
list values
-Doesn't take into
account all values

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AS Psychology - G541 Psychological Investigations Revision Notes
Mode Most common value(s) +Useful when data is in
categories
-Not useful when there
are several modes
Measures of Dispersion Range Highest to lowest value +Easy to calculate
-Affected by extreme
values
Standard Deviation Mathematical calculation +Precise, all values taken
into account
-Harder to calculate…read more

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