For the parametric case involving the means of paired samples, the null and alternative hypotheses are . A) H0: a1² = a2² H1: a1² × a2² B) H0: µ1 = µ2 H1: µ1 × µ2 C) H0: n1 = n2 H1: n1 × n2 D) H0: µD = 0 H1: µD × 0

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In the case of paired samples, the null hypothesis (H0) is that the mean difference (µD) between the paired observations is zero, and the alternative hypothesis (H1) is that the mean difference is not zero.

For the Parametric Case Involving the Means of Paired Samples