I need to survey 400 people using the Slovin's formula if I use 0.05 as margin of error. I can lower it to 100 if I use 0.10 but I do not know how to justify a higher margin of error. Please comment.
How can I justify a higher margin of error (0.10 instead of 0.05) so I can have a lower sample size?
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hyperhidrosis
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