Suppose a community Radio Questionnaire was available for a limited time online and a sample of 200 questionnaires filled by the community members was selected. The information about the survey was announced in the most popular podcast in the community.

Here are some of the questions:

i)What is your gender?

ii) What is your age?

iii) What is your favorite radio station?

iv) On average, how many hours per week do you spend listening to the radio?

Identify any sources of bias in this study?

Identify the sampling method?