Respuesta :
The method of gathering data in the given research is classified as; Sample Survey
- We are told that the researcher calls random radio listeners on the phone.
Now, these random radio listeners were to rank 5 different popular songs.
- We are told that this randomly picked radio listeners rankings helped to know the songs to play often.
From method of sampling, this method is referred to as Sample survey.
Read more on method of sampling at; https://brainly.com/question/9910540