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Perform an appropriate test of hypothesis to determine if there is evidence, at the .05 level of significance, to support the claim that the mean bone marrow microvessel density is higher before the stem cell transplant than after the stem cell transplant? What is the value of the sample test statistic?

A. z = 1.8424
B. t = 1.8424
C. t = 2.7234
D. p = 2.7234

 

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