Question

can someone help me please :'(

Answer 1

determine whether each sampling method is appropriate or not. if the method is not appropriate, briefly discuss what types of bias are present.

a) The National Rifle Association asks subscribers to their magazine to call a toll-free number and take a poll on gun control.

Answer 2

the method seems inappropriate... because when we do sampling we are the one that will approach to our target population. In this case, although you have your target population and just ask them to call a toll-free number and vote... what would be the chance that there will be a correspondent? unless you really approach them...