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Extra info for A Guide to SPSS/PC+
The variables may be derived from questionnaire items of varying style and format, but the information relating to each variable is coded into numerical form and placed in the appropriate column(s) of the dataset. Thus, for a sample of cases, each variable corresponds to a vertical slice through the dataset (or data matrix). 3 Preparation of the questionnaire and code book When developing a questionnaire it is useful to write out a codebook - a list of the variables corresponding to the items of the questionnaire, together with 18 A Guide to SPSS/PC+ information about how data relating to each of the items will eventually be coded.
33 years. 33; also, the women are more supportive of 'equal rights' than the men it looks as if the variable sex may be related to spersupport for equal rights. Such analyses lie at the heart of what SPSS/PC+ is designed to do (more accurately, less tediously, and with much larger datasets). Thus to explore such aspects of our data further, with a much larger sample and using more complex statistical procedures, we need to 'get into' the SPSS/PC+ system. SPSS/PC+ can handle many hundreds of cases and up to 500 variables.
Indoor work', 'outdoor work', 'both indoor and outdoor'), or a large range of individual occupations might be listed as categories. Whichever categorization system is adopted, a comprehensive list of categories must be devised, and a unique coding number assigned to each category. Coding systems should be both exclusive (no categories overlap) and exhaustive (all valid responses fall into one or other of the categories provided). A general category (such as 'Other') might be provided to ensure that the category system is exhaustive.