Why may i ask does the question ask for an expression estimate of mu_x, and the solution gives an expression which is mu hat x, which is actually estimating mu_x+1/2 given the rate interval specified.
Since the question specifically states mu_x, with no hat,to answer this question correctly wouldn't you need to commit the mortal sin of adjusting the deaths data and the exposed to risk also into the "age nearest birthday" format so it cuts the middle of the rate interval.
Last edited by a moderator: Mar 22, 2010