An Introduction to Data Analysis using SPSS

1 An Introduction to Data Analysis using SPSS Introduction and Aims Given some data from an experiment or survey of some kind, an important first step is to explore some of the basic features of the data using simple statistics and plots. Suppose, for example, that we conduct a survey of people and ask them how often they smoke cigarettes, as well as some demographic information such as age and sex. We might like to get an idea of the distribution of ages of people who responded to the survey, or the overall proportions of people who smoke regularly, occasionally and not at all, before we proceed to a more complex Analysis to determine factors which are associated with increased/decreased levels of smoking. This Introduction concentrates on using SPSS for the exploratory phase of data Analysis , then briefly discusses some commonly used statistical techniques, as follows: Page 1.

‘Plots’ button and deselect ‘Stem-and-leaf ’and select ‘Histogram’, then click Continue and then OK. The table headed Descriptives in the Output window shows a huge number of summary statistics, some of which might be incorporated into a report as part of a brief summary of this data. Next are a

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  Plot, Stem, Leaf, And leaf

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