Instructions

No in depth information is needed, just identify what you are being asked to identify.

For the following question, you can put short answers, there is no need to provide explanations unless otherwise asked.

A researcher wants to know if there is a relationship between practicing painting and photography skill. She asks participants how many hours they practiced painting each week. She compared it with the median number of 'likes' they received on their photographs published on a photo sharing website during the same week.

1. What kind of data structure is this? (.5):
2. Can the researcher infer causality? (.5):
3. What are the variables, if any? State variable and what kind it is? (1):
4. What is the most likely scale of measurement for each variable? (1):