2 Sample T-Test

Question 1

When do you use a two sample T- test?

Answer 1

When you want to know the difference between two population means when standard deviations are unknown and samples are drawn independently from each other.

Question 2

What is the general hypothesis for a two sample T-test?

Answer 2

H0: μ1- μ2 The difference between the population means (μ1- μ2) equals the hypothesized difference H1: μ1- μ2≠ δ0 The difference between the population means (μ1- μ2) does not equal the hypothesized difference. H1: μ1- μ2> δ0 The difference between the population means (μ1- μ2) is greater than the hypothesized difference. H1: μ1- μ2

Question 3

what are the conditions and assumptions for the two sample T-test?

Answer 3

-The two samples are independent from each other -The two populations must be independent -The Two samples must be distributed normally

Question 4

What is the formula for the test statistic for the two sample T-test

Answer 4

Question 5

How do you determine degrees of freedom

Answer 5