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Snapfish, a digital photography printing company, wants to know how many people might be interested in using their services for printing out photos from their
Snapfish, a digital photography printing company, wants to know how many people might be interested in using their services for printing out photos from their iPhones. They want to be 99% confident in their results.The amount of error they will allow is 3 and they have run previous surveys where the standard deviation was 14.How many people should Snapfish need to sample?
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