Question

vishal was interested in the relationship between a person’s age and their musical preferences. he called all the numbers listed in his city’s telephone directory, and whenever someone answered and agreed to be surveyed, he asked them for their age and interviewed them about their musical preferences.

once he was done, he analyzed his results and found that younger people prefer pop and hip - hop music while older people prefer jazz and classical music.

what type of statistical study did vishal use?

choose 1 answer:

a sample study

b experiment

c observational study

Explanation:

1. First, analyze the options:

• Option A: "Sample study" is not a standard type of statistical study in the context of this question. The main types are observational study, experiment, etc.
• Option B: An experiment involves manipulating variables (like assigning treatments) to see the effect. In this case, Vishal did not manipulate any variables, he just collected data on existing age and musical preferences.
• Option C: An observational study is when researchers observe and collect data on subjects without interfering or manipulating variables. Vishal collected data on people's age and musical preferences as they naturally are, without any intervention.

Answer:

C. Observational study