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Kbennallack656 Kbennallack656
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6 years ago
A study examines the relationship between strength of belief in previous lives (Yes, Not Sure, and No) and percentage of butterfat in milk most commonly purchased (Non-Fat, 1, 2, Whole).
 
  The data could be analyzed by which of the following statistical tests?
  a. Kendall's tau
  b. Pearson's product-moment correlation
  c. Principal components analysis
  d. Bland and Altman plot
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6 years ago
ANS: A
If one or both of two study variables do not meet the assumptions for a Pearson's correlation, or if the variables are scaled on an ordinal scale of measurement (rather than interval or ratio), both the Spearman rank order correlation and Kendall's tau are more appropriate statistics. The Spearman rank-order correlation and Kendall's tau calculations involve converting the data to ranks, thereby discarding any variance or normality issues associated with the original values.
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