Chapter 13, Problem 51ACB

a.

To determine

Identify the two qualitative variables measured for each Honda Accord collision claim.

b.

To determine

Create a contingency table for this data for the given situation.

c.

To determine

State the null and alternative hypothesis for testing whether injury rate for collision claims depends on Accord model (hybrid or conventional).

d.

To determine

Find the expected number of claims in each cell of the contingency table when the null hypothesis is true.

e.

To determine

Find the chi-square test statistic and compare the answer with the test statistic shown on the given SAS output.

f.

To determine

Find the rejection region for the test using $\alpha =0.05$ and compare your answer to the critical value shown on the given SAS output.

g.

To determine

Write an appropriate conclusion using the rejection region method and the p-value.

h.

To determine

Find the 95% confidence interval for the difference between the injury rates of conventional and hybrid Honda Accords.

Determine whether the injury rate for hybrid Accords is less than the injury rate for conventional Accords using the interval.