Hypothesis Testing: Two Populations Flashcards
1
Q
What statistic should be used when mean and variance is known for 2 populations?
A
Z statistic
2
Q
What statistic should be used when mean is known but variance is unknown and equal for 2 populations?
A
T statistic with Sp estimator with v = n1 + n2 - 2
3
Q
What statistic should be used when mean is known but variance is unknown and unequal for 2 populations?
A
T* statistic with v = see notes
4
Q
What statistic should be used when only variance is known for 2 populations?
A
F ratio statistic - unsymmetrical
