Question

An electric company conducted research on customer satisfaction. Match the description of the research with the sampling method used. Match Term Definition They gathered a number of responses that was proportionate to the number of customers within seven different zip codes. A) systematic sampling They gathered responses from customers that called in for assistance. B) convenience sampling They gathered responses from customers in every zip code. C) stratified sampling The phone system flagged customers at random to complete a phone survey. D) simple random sampling