Stat 211 Handout 9 (Chapter 9): Inferences Based on Two Samples tests



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STAT 211

Handout 9 (Chapter 9): Inferences Based on Two Samples
TESTS

  1. One-sided (One tailed) test:

  1. Lower tailed: H0: population characteristics  claimed constant value

(Left-sided) Ha: population characteristics < claimed constant value

  1. Upper tailed: H0: population characteristics  claimed constant value

(Right-sided) Ha: population characteristics > claimed constant value

  1. Two-sided (Two tailed) test: H0: population characteristics = claimed constant value

Ha: population characteristics  claimed constant value

Hypothesis testing for:


  1. Independent Samples

  1. 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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