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: You should check to make sure your '''secondary data''' comes from a reliable source.
: '''Secondary Data''' is important because you can use it to compare with your results so see if your results are the same everywhere in the world.
==Key Stage 3==
===Meaning===
'''Secondary Data''' is [[results]] taken from another, similar, [[investigation]] to your own.
===About Secondary Data====
: '''Secondary data''' is used to confirm the [[results]] of an [[experiment]] or [[investigation]] by checking that others can get similar [[results]].