Women's incomes. The average income of American women who work full-time and have only a high school degree is $33,230. You wonder whether the mean income of female graduates from your local high school who work full-time but have only a high school degree is different from the national average. You obtain income information from an SRS of 62 female graduates who work full-time and have only a high school degree and find that =$32,052. What are your null and alternative hypotheses?