A Type of Sampling (Independent or Paired), Sample Size(s), and a Figure

A type of sampling (independent or paired) , sample size(s) , and a figure showing the results of preliminary data analyseson the sample(s) are provided. The intent is to employ the sample data to perform a hypothesis test to compare the meansof the two populations from which the data were obtained. Use the information provided to decide which procedureshould be applied.
-Paired; n = 12. A normal probability plot for the paired differences is given below.

A) Paired t-test
B) Pooled t-test
C) Paired Wilcoxon signed-rank test
D) Nonpooled t-test

Correct Answer:

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