Question: Identify the consequences (i.e., increase, decrease, or none) that the following procedures are likely to have on both bias and sampling error in an observational

Identify the consequences (i.e., increase, decrease, or none) that the following procedures are likely to have on both bias and sampling error in an observational study.

a. Planning for data loss.

b. Taking measurements of the subjects while unaware of which subjects belong to which group.

c. Including only one sex and age group in the study.

d. Adjusting for body size using analysis of covariance.

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