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Mathematics 15 Online
OpenStudy (anonymous):

A production manager tests 10 toothbrushes and finds that their mean lifetime is 450 hours. She then designs a sales package for this type of toothbrush. It states that consumers can expect the toothbrush to last approximately 460 hours. This is an example of what phase of inferential statistics? A. Data organization B. Probability-based inference C. Data analysis D. Data gathering

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