Using the previous regression example, assume that information on life expectancy in the Dominican Republic is missing. If its IMR is 12 deaths per thousand, what can we predict the DR life expectancy to be? Remember, Y=77.23-.277(X1)

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.