A researcher published this survey result: "74% of people would be willing to spend 10% more for energy from a non-polluting source". The survey was conducted by posing the question on a national radio show and asking listeners to call in. 1,200 listeners responded. What is wrong with this survey?

a.precise numbers
b.nonresponse
c.correlation and causality
d.voluntary response

Question

A researcher published this survey result: "74% of people would be willing to spend 10% more for energy from a non-polluting source". The survey was conducted by posing the question on a national radio show and asking listeners to call in. 1,200 listeners responded. What is wrong with this survey?  
  
 a.precise numbers 
 b.nonresponse 
 c.correlation and causality 
 d.voluntary response

anonymous · Answer

I feel this is Voluntary Response is the inaccuracy of this survey.