STAT 211
Handout 9 (Chapter 9): Inferences Based on Two Samples
TESTS
One-sided (One tailed) test:
Lower tailed: H0: population characteristics claimed constant value
(Left-sided) Ha: population characteristics < claimed constant value
Upper tailed: H0: population characteristics claimed constant value
(Right-sided) Ha: population characteristics > claimed constant value
Two-sided (Two tailed) test: H0: population characteristics = claimed constant value
Ha: population characteristics claimed constant value
Hypothesis testing for:
Independent Samples
Population characteristics: Difference between two population means, 1-2.
0 is the claimed constant.
and are the population means for X's and Y's, respectively.
and are the sample means for X's and Y's, respectively.
m and n are the sample sizes for X's and Y's, respectively.
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