The six households below contain one mom, one dad, and either one or two children. The table below indicates the Census-assigned household number (for reference purposes; it is not used in this assignment), the number of children in the household, a two-child household indicator variable, and the number of hours the mom works in a typical week.

household	Number kids	Two kids	Mom's work hours
16761	2	1	0
24438	2	1	45
41729	2	1	0
42802	1	0	35
63528	1	0	40
148848	1	0	0

A. What is the average female work hours among one-child households? What is the average female work hours among two-child households? What is the difference in means?

B.  What is the estimated standard error of the difference in means?

C. What is the value of the test statistic?