Question

critical r value= .811 r= -.6857

If appropriate, find the equation of the regression line (y'= a +bx). If a regression line is not
appropriate, state why this is true.

Answer 1

H0 : There is no correlation exists between the x and y variable.

Ha : There is correlation exists between the x and y variable.

Given : r = -0.6857 and critical r value = 0.811

Rejection region ; Reject H0, if | r | ≥ 0.811 OR do not reject H0, of | r | < 0.811

Decision : | r | = 0.6857

As | r | is less than 0.811 , we do not reject the null hypothesis H0

Conclusion : There is no significant evidence that correlation exists between the x and y variable.

Since correlation does not exists between x and y ,regression line is not appropriate.