SOC202H1 Lecture : SOC202 MARCH 20.docx
Document Summary
We often want to know the existence and trhe strength of reln b/w two ariables. Finding a rel exist not indcite degree of ass all say is relationship. Not know what causes what, see an ass not causation. Vusualize differences in stgrentth of correlation by means of a scatterplot. Graph scores on x and y are scatter. Each dot on scattergram is a case in he data set. The dot is placed at the intersection of the cases scores x and y. Percent college and voter turnout, percent increases turnout incrases. Line of best fit clostest to a scater points. Greater extetn dots cludtered line stronger reltn. Described p or n higher scores higher on other a negative is opp high one mean low on other. Inspection of scatter plot firstthiing two interval level. Non linear is age and stress, high teen decreases and goes up again, correlation would be zero two lines cancel.
