8 Examine data collection procedures in search of opportunities to minimize measurement error, re-collect data and estimate reliability for new measures. In this case, the error present that was not attributable to variabiity across factors. As the Standard deviation increases reliability increases. You are more accurate when you can spread people out. Holding r xy constant, as reliability decreases, potential validity increases because there is more room for improvement.
Te test statistically based hypotheses.
Sample is random and independent 2. 8 Size decreases. Power influenced by sample size, measurement precision, effect size, extraneous variables, and alpha. As effect size increases, power increases - all other things being equal 8 Increases. Type I 9 1.