(a) (1 pt) Which of the following is the appropriate test and best distribution to use for the test?
(i) Two independent means, normal distribution
(ii) Two independent means, Student’s t-distribution
(iii) Matched or paired samples, normal distribution
(iv) Matched or paired samples, Student’s t-distribution
(b) (1 pt) Let μd be the population mean for the differences of weights (weight after the program – before the program). Fill in the correct symbol (=, ≠, ≥, >, ≤, <) for the null and alternative hypotheses.