Chapter 11, Problem 3CT

a.

To determine

The difference $d_i=X_i-Y_i$ for each pair of data.

b.

To determine

To compute: The values of $\overline{d}$ and $s_d$.

c.

To determine

To test: The hypothesis ${\mu }_d\ne 0$ at the level significance $\alpha =0.05$.

d.

To determine

To compute: The 95% confidence interval about the population mean difference ${\mu }_d$.