NUR 80A/B Lecture Notes - Lecture 8: Statistical Inference, Internal Consistency, Content Validity
14 Mar 2020
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Review the biophysiologic measures; in vitro, in vivo, anthropomorphic (bmi, height, weight) Controlling extraneous variables ( constancy of conditions, participant factors through randomization, homogeneity, matching) Internal : temporal ambiguity, selection bias, history, maturation, mortality: external : ability to generalize results to greater population, reliability, test-re test reliability: do you get same results over time. Internal consistency; do the items on a survey belong together use of. Cronbach"s alpha ( high internal consistency of cronbachs alpha of 0. 8 or above ) Know the different types of skewness ( positive (ie: income ), negative (i: age of death in. Levels of measurement : nominal, ordinal, interval, ratio developed countries) Postiive relationships: as one goes up, the other does; and sam thing when both go. Negative correlation relationship: as one goes up, the other goes down ( opposite directions) Be sure to know the coefficient general interpretation and the corresponding values ! Note: coefficient of determination is a squared value of correlation coefficient.
