The China Health and Nutrition Survey aims to examine the effects of the health, nutrition, and family planning policies and programs implemented by national and local governments. One of the variables collected on the survey was the number of hours parents spend taking care of children in their household under the age of 6. In 2006, 487 females and 312 males were surveyed for this question. On average, females reported spending 31 hours with a standard deviation of 31 hours, and males reported spending 16 hours with a standard deviation of 21 hours. (a) Organize this data in a table. (b) Calculate the difference in means between females and males (c) Calcite the standard error, the degrees of freedom, and the critical value t (d) Calculate a 95% confidence interval for the difference between the average number of hours Chinese females and males spending taking care of their children and interpret the results