Executives at a retailer are comparing items chosen by shoppers who either saw or did not see its most recent television advertising. Do the managers in charge of advertising hope to find association...

Executives at a retailer are comparing items chosen by shoppers who either saw or did not see its most recent television advertising. Do the managers in charge of advertising hope to find association between viewing ads and the choice of items?

This chart summarizes explanations given for missing work. The data are the explanations given for 100 absences by employees on the assembly line, administration, and supervising managers. The explanations are classified as medical, family emergency, or other.

(a) For which group are absences due to family emergencies most common?

(b) Are the two variables associated? How can you tell?