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a) A set of data normally distributed with mean and standard deviation of 95 and 9, respectively. Approximately what proportion of observations are between 77 and 122? b) Refer to part (a). If the data is not normally distributed, at least what proportion of the observations are between 50 and 140?

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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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