Question

All of the following statements are true about paired-sample t tests EXCEPT ______. They compare the calculated t scores from a sample to a t distribution They can be used when the population variance is unknown They can be used when the sample means are unknown. They involve hypothesis-testing procedures.

Answer 1

option A is true because we use paired sample t test to find the test statistic value and then we compare the test statistic with a t critical value to check whether the hypothesis test is significant or not.

option B is true because dependent sample t test can only be used when we have unknown population variance. If population variance is known, then we use z test.

option C is false because we can never calculate test statistic for paired samples t test with unknown mean values. So, this statement is false

option D is true because paired samples t test involves hypothesis testing procedure including two hypotheses, then test statistic, decision making and final conclusion.