Question 3 (14 marks) Consumer Reports evaluated and rated 40 brands of toothpaste. One attribute examined in the study was whether or not a toothpaste brand carries an American Dental Association (ADA) seal verifying here. effective decay prevention. The data for the 40 brands (coded 1=ADA seal, 0=no ADA seal) are listed 1 O O O 0 1 O 1 1 O O O 0 O O O O 1 0 0 O 1 1 0 0 1 1 0 O 1 0 1 0 0 Test at a=0.10 whether the true proportion of toothpaste brands with the ADA seal verifying effective decay prevention is less than 0.5