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The American Robin Redbreast has a mean weight of 77 g, with a standard deviation of 6 g. How common are Robins in the 59 g−71 g range?
in Statistics Questions by Silver Status (25.1k points) | 23 views

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Z1 = (59 - 77)/6

    = -3

 p1 = 0.0013

 

Z2 = (71 - 77)/6

    = -1

p2 = 0.1587

p2 - p1 = 0.1574 Therefore between 59g and 71g = 15,74%

 

by Wooden (1.7k points)

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