A certain type of circuit board manufactured for installatio

A certain type of circuit board manufactured for installation in computers has 12 microchips per board. During the quality control inspection often 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. Suppose the sample often boards used came from a shipment of 250 such boards. Estimate the total number of defective microchips in the shipment, and place a bound on the error of estimation.

Solution