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Unformatted text preview: statistic. Has standard deviation get larger, then standard error gets larger, confident intervals get larger, but t statistic gets smaller. So we have a statistic and now we need to compare it to a critical value. If statistic is greater than critical value, then there is relationship between two variables’ if the statistic is less than crictial value, then no relationship. First we need to know degrees of freedom. This gets you through hurdle 3 Correlation: Positive correlation – as X increases, Y increases Negative correlation – as X decreases, Y decreases Use Pearson’s R If all points on line and positive, then it equals 1. If all the points on line and negative slope, then it equals -1. Are sure are we that the correlation is either positive or negative? First get the t statistic and see if it’s greater than or less than critical value. So now we have to see if it’s substantly significant....
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This note was uploaded on 08/30/2011 for the course POL 51 taught by Professor Ryan,john during the Summer '08 term at UC Davis.
- Summer '08