A New York Times report from March 2005 provided information on race of U.S. military personnel who had been killed in Iraq as of March 9. The proportion of blacks was 0.109.
a. Which would produce a larger standardized difference (z): testing for a difference from proportion of all military personnel who were black (0.186) or testing for a difference from proportion of all Americans who are black (0.130)?
b. Which would produce a smaller P-value: testing for a difference from proportion of all military personnel who were black (0.186) or testing for a difference from proportion of all Americans who are black (0.130)?