A researcher was interested in utilities provided by city go

A researcher was interested in utilities provided by city governments. The researcher randomly selected 20 counties from a list of all counties in the U.S. From each of these counties the researcher then contacted each city government (a total of 192) and found that 12 (6.25%) of them provided electricity to their residents. The type of sample used in this example is a

simple random sample

cluster random sample

stratified random sample

none of the above

Solution

THIS IS AN EXAMPLE OF SIMPLE RANDOM VARIABLE AS AMONG A LIST OF ALL COUNTRIES RANDOM 20 ARE CHOOSEN WHICH MAKE IT A SIMPLE RANDOM SAMPLE.