PSYCH 311 Lecture Notes - Lecture 5: Standard Deviation, Level Of Measurement
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Case study: raw scores, raw distributions, z-scores, and z-distributions. Background: z-scores use information about the characteristics of a population and transform raw scores into standardized values. z-scores provide you with information about the location of scores within a distribution. Recall that a normal distribution has several characteristics, some of which we"ve discussed up to now. A researcher is investigating the effects of retirement from work on a variety of psychological factors. A topic of particular interest to the researcher is the retiree"s perceptions of the contributions he or she has made to the occupational field. For example, the researcher might ask retiring folks to what extent they believe their work had a positive impact on their profession. The researcher uses an interval scale of measurement, in which lower values indicate less positive perceptions of the retiree"s contributions to their profession and higher values indicate more positive perceptions. Using the description and normal distribution in model 1, address the following items.
