Chapter 8.3, Problem 1TY

a.

To determine

To identify: The claim and state $H_0$ and $H_a$.

b.

To determine

To identify:  The level of significance α.

c.

To determine

To find: The critical value and rejection regions.

d.

To determine

To find: The value of $\overline{d}$ and $s_d$.

e.

To determine

To find: The standardized test statistic t.

f.

To determine

To decide: Whether to reject or fail to reject the null hypothesis when the level of significance $\alpha =0.05$.

g.

To determine

To test: The claim that athletes can decrease their times in the 40-yard dash using the manufacturer's training shoes.