Question

question 3
a probability sample in marketing research is one in which:
participants volunteer to be part of the study
the researcher chooses respondents based on convenience
every element in the population has a known chance of being selected
only loyal customers are chosen to participate

Explanation:

To determine the correct option, we analyze the definition of a probability sample. A probability sample requires that every element in the population has a known, non - zero chance of being selected.

• The option "Participants volunteer to be part of the study" describes a voluntary sample, not a probability sample.
• "The researcher chooses respondents based on convenience" is a convenience sample, which is a non - probability sample.
• "Only loyal customers are chosen to participate" is a non - random, non - probability sampling method as it targets a specific subset without a known selection probability for all population elements.
• The option "Every element in the population has a known chance of being selected" matches the definition of a probability sample.

Answer:

C. Every element in the population has a known chance of being selected (assuming the options are labeled A, B, C, D with A being "Participants volunteer to be part of the study", B being "The researcher chooses respondents based on convenience", C being "Every element in the population has a known chance of being selected", D being "Only loyal customers are chosen to participate")