Ch10 - Chapter 10 1 Chapter 10 Two Sample Hypothesis Tests...

Info iconThis preview shows pages 1–7. 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

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

View Full DocumentRight 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 10 1 Chapter 10 Two Sample Hypothesis Tests Chapter 10 2 Two Sample Tests Two sample tests are used when weve applied two treatments to two groups The groups are comprised of different individuals so that the two samples are independent Chapter 10 3 Testing Difference in Two Propo H : 1 = 2 H 1 : 1 2, 1 < 2, 1 > 2 Use 2 1 2 1 2 1 2 1 ) 1 1 ( ) 1 ( n n x x p n n p p p p z + + = +-- = Example Does Dells new design strategy work? A sample of 200 people before the strategy resulted in 90 saying they would buy a Dell. After the strategy, 50 were polled and 30 said they would buy Dell. I want a 5% level of significance. What do you conclude? Chapter 10 4 Example BEFORE (sample 1) AFTER (sample 2) n 1 = 200 n 2 = 50 x 1 = 90 x 2 = 30 p 1 = .45 p 2 = .60 Chapter 10 5 2 1 2 1 2 1 2 1 ) 1 1 ( ) 1 ( n n x x p n n p p p p z + + = +-- = Overview Comparing 2 proportions Comparing 2 means Independent samples with unknown variances, assumed unequal (case 3) Paired samples paired t test Chapter 10 6 Chapter 10...
View Full Document

This note was uploaded on 12/13/2010 for the course LEEDS BCOR 1020 taught by Professor Heatheradams during the Spring '08 term at Colorado.

Page1 / 16

Ch10 - Chapter 10 1 Chapter 10 Two Sample Hypothesis Tests...

This preview shows document pages 1 - 7. Sign up to view the full document.

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