Please help me with this sampling problem.

A certain type of circuit board manufactured for installation in computers has 12 microchips per board. During the quality control inspection of ten of these boards, the numbers of defective microchips on each of the ten boards were as follows: 2, 0, 1, 3, 2, 0, 0, 1, 3, 4 Estimate the proportion of defective microchips in the population from which this sample was drawn and place a bound on the error of estimation