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Mathematics, 06.05.2020 02:29 tynitenaire

You are planning a study to determine if mean height in a population has
changed. The populations mean height in 1920 was 64 inches with a standard
deviation of 4 inches. The study needs a big enough sample to detect a change
of 1% with a power 0.8 and a significance of 0.05. How big should the sample
be?

A 307
B 70
C 69.09
D 306.25

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