Assume that a set of data contains a curvilinear relationship between X and Y (the best-fitting line is slightly curved). Would it ever be appropriate to calculate r on these data?
Answer to relevant QuestionsSeveral times in this chapter I referred to the fact that a correlation based on a small sample might not be reliable. (a) What does “reliable” mean in this context? (b) Why might a correlation based on a small sample ...The chapter referred to a study by Wong who showed that the incidence of heart disease varied as a function of solar radiation. What does this have to say about any causal relationship we might infer between the consumption ...Infant mortality is a very serious problem to society. Why would psychologists be interested in this problem any more than people in other professions? Why would we ever care if a slope is significantly different from 0? Wainer (1997) presented data on the relationship between hours of TV watching and mean scores on the 1990 National Assessment of Educational Progress (NAEP) for eighth-grade mathematics assessment. The data follow, separated ...
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