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1 what is the difference between a stratum and a cluster2 what is the drawback of obtaining random samples by
1 why are psychologists sometimes interested in epidemiology2 why do researchers use probability rather than
how do the concepts of present and future value help us make the kinds of decisions we must make to plan
1 a successive independent survey design and a longitudinal survey design both examine changes in responses over time
1 how does descriptive research differ from other kinds of research strategies such as correlational experimental and
imagine that you have collected the following set of iq scoresa construct a simple frequency distribution of these
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1 how can partial correlation help researchers explore possible causal relationships among correlated variables2 when
imagine you obtained a point biserial correlation of 35 between gender and punctuality showing that men arrived later
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1 write the general form of a regression equation that has a single predictor variable identify the criterion variable
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one of the behavioral research case studies in this chapter involved agocha and cooperamp39s 1999 study of partner
1 currently you own 10 of the outstanding stock of abc company the company has decided to issue additional shares of
1 why do researchers use factor analysis2 imagine that you conducted a factor analysis on a set of variables that were
1 describe how structural equations modeling works2 distinguish between latent variable modeling and path analysis as
1 when would you calculate a multiple correlation coefficient what do you learn if you square a multiple correlation2
psychology developed primarily as an experimental science however during the past 20 to 25 years non-experimental
1 how many conditions are there in the simplest possible experiment2 describe how participants are assigned to
1 what is a factorial design why are factorial designs used more frequently than one-way designs2 how many independent
1 describe a 2 x 2 x 3 factorial design how many independent variables are involved and how many levels are there of
1 describe a mixed or split-plot factorial design this design is a hybrid of what two other designs2 what is a main
1 what is an interaction2 how many interactions can be tested in a 2 x 2 design in a 3 x 3 design in a 2 x 2 x 3
1 what can researchers do to minimize error variance2 discuss the trade-off between internal and external validity