Suppose that X and Y are variables with

The following is an excerpt from the R output of a linear regression of Y on X, with n=28:

Estimate Std. Error t value Pr(>|t|) 1 (Intercept) 1.7976 0.3101 5.797 <0.001 *** 2 x 0.2569 0.1142 2.250 0.033 *

For the two sided 95% confidence interval for ;

Upper limit (3dp) =