Statistics Terminology

Test statistic for Linear Correlationt=r21−rn − 2If the absolute value of the test statistic exceeds the critical values, rejectthe null hypothesis. Otherwise fail to reject the null and there is not alinear correlation.RegressionGiven a collection of paired sample data, the regression equationy = b0 + b1xAlgebraically describes the relationship between the two variables. Thegraph of the regression equation is called the regression line or the line ofbest fit.x = independent variable or predictor variableŷ = dependent variable or response variable1∑xy− ( ∑ x)( ∑y)2n( ∑ x ) − ( ∑ x) 2nb =(slope) = y b x (y-intercept)Given a collection of paired data (x, y), ( y)b0 −1x, is the centroid. (Find theaverage of the x’s and the average of the y’s)The regression line best fits the sample data points.