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a researcher was interested in whether people tend to marry individuals who are about the same level of physical
1 when do researchers use regression analysis2 what is multiple regression analysis3 distinguish among simultaneous or
1 write the general form of a regression equation that has a single predictor variable identify the criterion variable
imagine that the equation for predicting y from x is y 112 - 47xhow would you use this equation to predict a
1 in stepwise regression why might a predictor variable that correlates highly with the criterion variable not enter
1 when would you calculate a multiple correlation coefficient what do you learn if you square a multiple correlation2
1 describe how structural equations modeling works2 distinguish between latent variable modeling and path analysis as
1 why do researchers use factor analysis2 imagine that you conducted a factor analysis on a set of variables that were
1 discuss the advantages and disadvantages of using a successive independent samples survey design versus a
1 draw a negatively skewed distribution2 what does it indicate if a participant has a z-score of 25 -80
in a normal distribution what percentage of scores fall between -1 and 1 standard deviations from the meanbetween the
1 under what conditions is the median a more meaningful measure of central tendency than the mean2 why do researchers
1 what three rules govern the construction of a grouped frequency distribution2 what is the difference between a
under what conditions is a grouped frequency distribution more useful as a means of describing a set of scores than a
1 distinguish between a quota sample and a purposive sample2 what three criteria characterize good descriptions of
1 what type of sample is used most frequently in behavioral research2 is it true that valid conclusions cannot be drawn
1 what is the difference between a stratum and a cluster2 what is the drawback of obtaining random samples by
1 what is the central difficulty involved in obtaining simple random samples from large populations2 how does cluster
1 a successive independent survey design and a longitudinal survey design both examine changes in responses over time
1 why are psychologists sometimes interested in epidemiology2 why do researchers use probability rather than
1 what does the error of estimation tell us about the results of a study conducted using probability sampling2 what
suppose that you wanted to study children who have down syndromehow might you use cluster sampling to obtain a
using the table of random numbers in appendix a-1 draw a stratified random sample of 10 boys and 10 girls from the
imagine that you have collected the following set of iq
1 the correlation between self-esteem and shyness is -50 interpret this correlation2 which is larger-a correlation of