Asample of 6 observations collected in a linear regression study on three variables, x_1(independent variable), x_2(independent variable) and y(dependent variable). the sample resulted in the following data. ssr=72, sst=88calculate the f test statistics to determine whether a statistically linear relationship exists between x and y. a sample of 12 observations collected in a regression study on three variables, x_1(independent variable), x_2(independent variable) and y(dependent variable). the sample resulted in the following data. ssr=60, sst=86calculate an unbiased estimate of the variance of the error term epsilon.