question 21

A study of more than 20,000 mothers of newborns revealed a 10% greater likelihood of purchase some product by mothers of boys versus mothers of girls. The null hypothesis is: "Mothers of boys will be no more likely to purchase the product than will mothers of girls." If we test only for the probability on the "greater than" side, we should conduct a _____.

Multiple Choice

two-tailed test

one-tailed test