Question

The results of a poll show that the percent of people in a town who want an observatory built on a nearby mountain is in the interval (0.60, 0.82) . What is the point estimate for the percent of people in the city who want the observatory? What is the poll's margin of error?
The point estimate for the percent is ?
.

The poll's margin of error is ?
%.

Answer 1

In finding this value you average lower and upper bound
  (0.6+0.82)/2 = 0.71   =0.71  estimated    margin of error = distance from  estimate point lower/ upper bound   This interval will be twice margin error
   (0.82-0.6)/2 = 0.11    How far is 0.82 from 0.71 ??   =0.11=11%