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interior designer working on new house design project in office. choosing flooring and furniture materials and colors from samples
Exclude people from the sample. Refining survey results, enhancing data accuracy. Removing bias. Narrowing focus in demographic studies. Segmentation tactics.
Gloved hands holding blood sample at veterinary clinic laboratory.
Scientist, hand and blood vial for test, gloves and person with medicine cure, science or medical research. Closeup, sample or exam in laboratory for paternity, doctor and dna for genetics results
A small sample bottle of parfume

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