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k123p k123p
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7 years ago
A Wilcoxon rank sum test for comparing two populations involves two independent samples of sizes 15 and 20 . The un-standardized test statistic (that is the rank sum) is W = 210 . The value of the standardized test statistic (that is, the value of z-approximation test statistic) is:
 a. 14.
  b. 10.5.
  c. 6.
  d. -1.4.
  e. -8.
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7 years ago
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