Question

Which of the following is generally true regarding a paired (two sample) t-test?

1. it uses a z or normal distribution when the population variance is unknown.
2. The F distribution is used on the ratio os standard deviations
3. it is most commonly used in cross section study design
4. it can vibe considered a one-sample t-test on the difference of pairs

Answer 1

Answer:

i think that it's answer is

option 4