The information about groundwater recorded by a student is valid when

it is not biased

its results cannot be repeated

it is not obtained from a primary source

its findings do not have to be shared with others

The correct answer to this question is "it is not biased." The information about groundwater recorded by a student is valid when it is not biased. The results could be repeated, it should be obtained from a primary source and findings should be shared with others. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help. 

Ihaven't done that yet, so no idea,but this is not the right place to ask