T Test (Independent)

Question 1

How do u calculate estimated variance (for each group)

Answer 1

Minus score from mean
Square them
Add them altogether
Divide by df

Question 2

Steps in the independent means t test

Answer 2

1. Estimated population variance for each group
2. Pool them
3. Variance of each population distribution of means
4. Variance of the distribution of differences between means
5. Standard error
6. T test

Question 3

What does the effect size tell us

Answer 3

how meaningful the relationship between variables or the difference between groups is