desiree4983 desiree4983

24-09-2020
Chemistry

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32. A good way to avoid blas when collecting samples is to
O use three different types of variables
use many different types of variables
collect a large sample number
collect a small sample number

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dreamgurl39 dreamgurl39

25-09-2020

Provides equal odds for every member of the population to be choose as a parcipant in the study land

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