What is an “optimally weighted linear composite”? What is a “unit-weighted linear composite”? What are the relative advantages and disadvantages of these two ways of forming scores?
Answer to relevant QuestionsChapter 1 distinguished between two different kinds of samples: A. Random samples (selected randomly from a clearly defined population) B. Accidental or convenience samples a. Which type of sample (A or B) is more commonly ...Describe the guidelines for selecting an appropriate bivariate statistic. That is, what do you need to ask about the nature of the data and the research design in order to choose an appropriate analysis? Three different methods were presented for the computation of scale scores: summing raw scores on the X variables, summing z scores on the X variables, and saving factor scores from a FA of a set of X variables. (Assume that ...Why is it generally more difficult to establish the validity of a measure than its reliability? When you compute difference scores (for a paired samples t test), what happens to the parts of scores that are associated with stable individual differences among persons? (In the models in this chapter, these parts of ...
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