Your job is to monitor the quality control process at a plan…

Your job is to monitor the quality control process at a plant that produces slabs of plastic used in the retail markets.  You randomly sample 160 slabs from the production line.  There are 30 slabs with defects.  Round to 3 decimal places as needed. a) What is the point estimate of the parameter? [a] b) What is the standard error? [b]