In a study about houseflies, the distribution of wing lengths is unimodal and symmetric with mean 45.5 millimeters and standard deviation 3.9 millimeters. Using the empirical rule,
estimate the probability that a wing length randomly selected from the data is
a. between 45.5 and 49.4 millimeters.
b. less than 37.7 millimeters.
c. greater than 57.2 millimeters.



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