The purpose of a double-blind study is to:

a. achieve comparability of cases and controls.
b. reduce the effects of sampling variation.
c. avoid observer and interviewee bias.
d. avoid observer bias and sampling variation.
e. avoid interviewee bias and sampling variation.

C. avoid observer and interviewee bias.

Explanation:

I

Double blind type is a type of clinical trial in which neither the observer nor the interviewee team

knows the treatment type to be administered to a m specific

participant is receiving. This helps prevent bias or expectations from influencing the results of the study.

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explanation:

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im not in connections yet but i might can you some questions. what grade are you in?