Primary & secondary data

Question 1

What is primary data?

Answer 1

Data that the researcher collects themselves.

Question 2

What is secondary data?

Answer 2

Data that was collected for another purpose/in a different study and then used in a new study.

Question 3

What is meta-analysis?

Answer 3

A large scale review study where a researcher take the data of lots of individual studies and then analyses it all together to get an overall picture.
An “analysis of analyses”.