Chapter 6.4, Problem 1TY

a.

To determine

To find: The degrees of freedom

To identify: The level of confidence.

b.

To determine

To find: The areas to the right of ${\chi }_R^2$ and ${\chi }_L^2$.

c.

To determine

To find: The critical values ${\chi }_L^2$ and ${\chi }_R^2$.

d.

To determine

To interpret: The critical values obtained in part (c)