KINE 2050 Lecture Notes - Lecture 18: Grip Strength, Sit-Up, Confidence Interval
7 Mar 2016
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If r = . 3 n = 200 - what conclusion about ht & wt: give another example of negative relationship. professor said that there is a department that determines between your grades and your salary. Table 2 correlations between gpa and earnings by department/grouping. Languages and linguistics -0. 31* 57 math & stats 0. 08 12. Correlation (r) gives the strength of the relationship between two variables. If value of r is significant it implies a linear relationship, but you must do regression analysis to find exact numerical relationship. Regression analysis calculates a linear equation that provides (predicts) values of y for given values of x. To describe the relationship between two variables mathematically. To enable researchers to make predictions. e. g. predict marks at university based upon entrance exam: predict km/1 based upon weight of automobile. Seldom will the exact value of y be predicted, but usually reasonably close. A regression equation is one which best fits the scattergram.
