23. 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.

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 s2 is unsuitable for comparing the mean wing stroke frequencies for the two species of bees.

Transcribed Image Text:

Species 1 Species 2 235 180 225 169 190 180 188 185 178 182