The use of cellular phones in automobiles has increased dramatically in the last few years. Of concern to traffic experts, as well as manufacturers of cellular phones, is the effect on accident rates. Is someone who is using a cellular phone more likely to be involved in a traffic accident? What is your conclusion from the following sample information? Use the 0.05 significance level.

Had Accident in the Last Year Did Not Have an Accident in the Last Year

Uses a cell phone 70 441

Does not use a cell phone 40 361

H₀: There is no relationship between phone use and accidents.

H₁: There is a relationship between phone use and accidents.

a. State the decision rule using 0.05 significance level.

Reject H0 if chi-square >_____

b. Compute the value of chi-square.

Chi-square value_____