Chapter 12, Problem 26SE

a.

To determine

Determine and compare the sample means and state whether the result fit the given theory or not.

b.

To determine

Conduct a two-sample "$\text{\$}$ " $t\text{-test}$ to determine whether the null hypothesis of no difference in mean times can be rejected.

c.

To determine

Conduct a two-sample "$\text{\$}$ " $t\text{-test}$ to determine whether the null hypothesis of no difference in mean times can be rejected.

d.

To determine

Identify the appropriate test for the given data set.

e.

To determine

Explain why the random order of assignment of the subjects is required.