Question

Which of the following are assumptions for the independent-measures t formula for hypothesis testing?

1) The observations within each sample must be independent

2) The two populations from which the samples are selected must be normal

3) The two populations from which the samples are selected must be have equal variances

4) All of the above

Answer 1

Note: Following are three assumptions for the intepedent-measures t formula for hypothesis testing.

There are three assumptions that should be satisfied before you use the independent measures t formula for

hypothesis testing:

i) The observations within each sample must be independent .

ii) The two populations from which the samples are selected must be normal.

iii) To justify using the pooled variance, the two populations from which the samples are selected must have equal variances.

Therefore, answer is,

4) All of the above