note03 - Chapter 2: Two-Sample Methods 1. Two-Sample...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 2: Two-Sample Methods 1. Two-Sample Permutation Test Two-sample t-test Assumptions X 1 ,...,X m iid N ( X , 2 X ) and Y 1 ,...,Y n iid N ( Y , 2 Y ) X 1 ,...,X m and Y 1 ,...,Y n are independent 2 X = 2 Y Test H : X = Y vs H a : X > Y Pooled sample variance: Test statistic: Reject H if Can we guarantee that the assumptions of the t-test are al- ways met? Two-sample permutation test Assumptions X 1 ,...,X m iid F 1 and Y 1 ,...,Y n iid F 2 ( F 1 and F 2 are continuous cumulative distribution) X 1 ,...,X m and Y 1 ,...,Y n are independent Assume F 1 ( x ) = F 2 ( x ) 1 Hypotheses: H : = 0 H a : > H : = 0 H a : < H : = 0 H a : negationslash = 0 H asserts that the X variable and Y variable have the same proba- bility distribution, but the common distribution is not specified Test steps D the difference between two groups Compute...
View Full Document

This note was uploaded on 07/22/2011 for the course STA 4502 taught by Professor Staff during the Spring '08 term at University of Florida.

Page1 / 5

note03 - Chapter 2: Two-Sample Methods 1. Two-Sample...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online