Bees Insects hovering in flight expend enormous amounts of energy for their size and weight. The data shown here were taken from a much larger body of data collected by T.M. Casey and colleagues. 15 They show the wing stroke frequencies (in hertz) for two different species of bees, = 6 Euglossa imperialis Cockerell.
a. Based on the observed ranges, do you think that a difference exists between the two population variances?
b. Use an appropriate test to determine whether a difference exists.
c. Explain why a Student’s t-test with a pooled estimator is unsuitable for comparing the mean wing stroke frequencies for the two species of bees.
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