Please check my work and if you get a different answer please explain how and why. Thank you.

1.The table below lists infant mortality in Maryland in 2007 and the estimated racial breakdown of the U.S. population according to the 2000 census.The total U.S. population is 281,421,906.

Race Infant mortality (per 1000 births

- Maryland 2007

% of U.S. population (2000)

White 4.6

75.1

Black 14.0

12.3

Hispanic 3.8

12.5

a.If possible, calculate the crude infant mortality rate for Maryland (all races).

We cannot assume it follows the U.S. Trend so we cannot use the U.S. Population and the population of Maryland in 2007 is not given to calculate the crude infant mortality rate.

b.Calculate the race-adjusted infant mortality rate for 2007 Maryland using the U.S. population in 2000 as the standardizing population.

= [4.6 * 211,347,851.4 + (14 * 34,614,894.44) + (3.8 * 35,177,738.26] / 281,421,906 = 5.65 per 1000 population

c.The U.S. population is 281,421,906. Is that needed to solve this problem?

4.6 * (0.75*281,421,906) + (14*0.123*281,421,906) + (3.8*0.125*281,421,906) / 281,421,906.

From the equationabove we can remove/ cancel out 281,421,906 altogether this the U.S. population is unnecessary because we go from a normalized rate back to a normalized rate