i. If samples taken from two populations are not independent, then a test of paired differences is applied. ii. The paired difference test has (n₁ + n₂- 2) degrees of freedom. iii. The paired t test is especially appropriate when the sample sizes of two groups are the same. A) (i), (ii), and (iii) are all correct statements. B) (i) and (ii) are correct statements but not (iii). C) (i) and (iii) are correct statements but not (ii). D) (ii) and (iii) are correct statements but not (i). E) (i) is a correct statement but not (ii) and (iii).

Question

Quizplus · Accepted Answer

The Answer of i. If samples taken from two populations are not independent, then a test of paired differences is applied. ii. The paired difference test has (n₁ + n₂- 2) degrees of freedom. iii. The paired t test is especially appropriate when the sample sizes of two groups are the same. A) (i), (ii), and (iii) are all correct statements. B) (i) and (ii) are correct statements but not (iii). C) (i) and (iii) are correct statements but not (ii). D) (ii) and (iii) are correct statements but not (i). E) (i) is a correct statement but not (ii) and (iii).

I If Samples Taken from Two Populations Are Not Independent