Chuck wants to know which brand of tire, cap A or cap b , lasts longer on cars. He chooses 32 cars and puts brand cap A on one side of the car and brand cap b on the other side. The side that receives brand cap A is determined by a coin toss. After three months, Chuck measures the amount of tread on all tires to determine if, on average, there is a difference open paren brand A minus brand B close paren in tread wear. Are the conditions for inference met?