Mediation That is, Indirect Effects What is a Mediator? An intervening variable. X causes M and then M causes Y.
Economics 20 - Prof. Anderson1 Instrumental Variables & 2SLS y = 0 + 1 x 1 + 2 x 2 +... k x k + u x 1 = 0 + 1 z + 2 x 2 +... k x k + v.
SAMPLING DISTRIBUTIONS Chapter 7. 7.1 How Likely Are the Possible Values of a Statistic? The Sampling Distribution.
Statistics and Quantitative Analysis U4320 Segment 6 Prof. Sharyn O’Halloran.
One sample T Interval Example: speeding 90% confidence interval n=23 Check conditions Model: t n-1 Confidence interval: 31.0±1.52 = (29.48, 32.52) STAT.
Statistics for the Behavioral Sciences Second Edition Chapter 8: Confidence Intervals, Effect Size, and Statistical Power iClicker Questions Copyright.
Two-Sample Inference Procedures with Means. Remember: We will be intereste d in the differen ce of means, so we will use this to find standard error.
1. Exams 2. Sampling Distributions 3. Estimation + Confidence Intervals.
Type I and Type II Error AP Stat Review, April 18, 2009.
Psych 230 Psychological Measurement and Statistics Pedro Wolf October 28, 2009.
TOPIC 10 Discrete (Categorical) Data Analysis. Discrete Random Variables Recall that discrete random variables may take only discrete values. For example,
Objective: To estimate population proportions under specific conditions with various confidence levels.