A Random Sample of 160 Car Purchases Are Selected and Categorized

Short Answer

A random sample of 160 car purchases are selected and categorized by age. The results are listed below. The age distribution of drivers for the given categories is $18 \%$ for the under 26 group, $39 \%$ for the 26-45 group, 31\% for the 46-65 group, and $12 \%$ for the group over 65 . Test the claim that all ages have purchase rates proportional to their driving rates. Use $\alpha = 0.05$ .