1. The following statistics were calculated from pairs of observations where X represents the independent variable and Y represents the dependent variable.
Σx = 511 Σy = 314 Σxy = 19,064
Σx^2 = 34,234.5 Σy^2 = 13,036 n = 8
Determine the least squares line.
Determine the sample correlation coefficient between X and Y.
Determine if there is a linear relationship between X and Y at the .10 significance level.
Find a 90% confidence interval for the slope of the regression line.
Find a 90% confidence interval for the mean of Y if X = 60.
Find a 90% prediction interval for Y if X = 60.