Ch. 9 Assessing Studies Based on Regressions

Ch. 9 Assessing Studies Based on Regressions - ASSESSING...

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

View Full Document Right Arrow Icon
1 | Assessment ASSESSING STUDIES BASED ON REGRESSIONS (Ch. 9) The recommended exercise questions from the textbook: Chapter 9: All except (9.4) - (9.5), (9.8) of the 2 nd and 3 rd ed, and except (9.12) – (9.13) of the 3 rd ed.
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 | Assessment [1] Motivation You have some regression results. • Are they reliable? Do they reveal the truth about the population you have studied? Internally valid? • Can they be generalized? Do your results apply to other populations of interest? Externally valid?
Background image of page 2
3 | Assessment Definition: A statistical analysis is internally valid if the statistical inferences about the causal effects are valid for the population being studied. The analysis is externally valid if its inferences and conclusions can be generalized from the population and setting studied to other populations and settings.
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 | Assessment [2] Threats to internal validity • Studies using regression are internally valid if estimated coefficients are unbiased and consistent.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 02/10/2012.

Page1 / 11

Ch. 9 Assessing Studies Based on Regressions - ASSESSING...

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

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