QUESTION

Question

A sample of 5 observations collected in a regression study on two variables, x(independent variable) and y(dependent variable). The sample resulted in the following data.

summation (x_i-xbar)2=15, summation (x_i-xbar)(y_i-ybar)=60, xbar=3, ybar=10

Calculate the y-intercept (b_0) of the estimated regression equation.

QUESTION

A sample of 13 observations collected in a regression study on two variables, x(independent variable) and y(dependent variable). The sample resulted in the following data.

summation (x_i-xbar)2=14, summation (x_i-xbar)(y_i-ybar)=72, xbar=3, ybar=10

Calculate the slope of the estimated regression equation.

10 points

QUESTION

A sample of 9 observations collected in a regression study on two variables, x(independent variable) and y(dependent variable). The sample resulted in the following data.

SSE=14, SSR=79

Calculate the coefficient of determination for the developed estimated regression equation.