Consider the following statements.
(i). If we are testing for the difference between two populationmeans, it is assumed that the sample observations from onepopulation are independent of the sample observations from theother population.
(ii). If we are testing for the difference between twopopulation means, it is assumed that the two populations areapproximately normal and have equal variances.
(iii). The critical value of t for a two-tail test of thedifference of two means, a level of signifi- cance of 0.10 andsample sizes of seven and fifteen, is ±1.734.
Which of the following is true?
A. (i), (ii), and (iii) are all correct statements.
B. (i), (ii), and (iii) are all false statements.
C. (i) and (ii) are correct statements but not (iii).
D. (i) and (iii) are correct statements but not (ii). E. (ii)and (iii) are correct statements but not (i).
