(Answered) The life spans of a species of fruit fly have

Economics

The life spans of a species of fruit fly have a? bell-shaped distribution, with a mean of 33 days and a standard deviation of 4 days.

(a) The life spans of three randomly selected fruit flies are 34 ?days, 31 ?days, and 45 days. Find the? z-score that corresponds to each life span. Determine whether any of these life spans are unusual.

?(b) The life spans of three randomly selected fruit flies are 29 ?days, 25 ?days, and 45 days. Using the Empirical? Rule, find the percentile that corresponds to each life span.

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