The Amount of Time the Husband and the Wife Spend

Multiple Choice

The amount of time the husband and the wife spend on house work is measured for 15 women and their 15 husbands. For the wives the mean was 7 hours/week and for the husbands the mean was 4.5 hours/week. The standard deviation of the differences in time spent on house work was 2.85. What is the value of the test statistic for testing the difference in mean time spent on housework between husbands and wives?

A) 0.88
B) 2.40
C) 3.40
D) 4.80