{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

418-CorrelatedSamplesT-ExtraPractice

# 418-CorrelatedSamplesT-ExtraPractice - Two-Group Designs...

This preview shows pages 1–5. Sign up to view the full content.

1 Two-Group Designs: t-test for correlated groups (chapter 9) Assumptions for Correlated-Groups t Test Random selection of participants Observations within each treatment are independent Normal population distribution Homogeneity of variance in the two populations of scores Interval or ratio data Correlated Groups T-test Practice Some investigators have proposed that students have elevated blood pressure during finals week . To test this hypothesis 8 students volunteered to have their blood pressure taken at the beginning of the semester and then again during finals week. The blood pressure data (diastolic) is listed below. Conduct a t test to determine if there is a difference between the first week and finals week.

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

View Full Document
2 State Hypotheses, Set Criterion H 0 : Mean during Mean pre H a : Mean during > Mean pre 2-tailed alpha of .05 D D D D D μ D = 0 S D D D D D D Rejection Region (Mean pre - Mean during < 0) . pre during 89 92 76 78 84 92 89 94 74 93 66 74 56 65 74 73 Data: Diastolic Blood Pressure Finding the Critical Value of t 2-tailed, alpha=.05 df=n-1=8-1=7 D D D D D

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 5

418-CorrelatedSamplesT-ExtraPractice - Two-Group Designs...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online