1. There is variation in the migratory behavior of certain birdspecies. Some populations migrate while others do not. A study wasrun on Blue-Tailed Bee-Eaters. The south-east Asia populationmigrates south for the winter while the Australasia population doesnot. Using a capture technique called mist-netting, wing lengthswere measured for each population. Is there a statisticallysignificant difference between the two populations? What conclusioncan you draw from this information?

Use your reading handout to calculateall the necessary parts of a t-test. Use an alpha=0.25 in thet-table to find your critical value.

PopulationA                                                                                            Population B

(South-East Asia,Migratory)                                                      (Australasia, Non-migratory)

Wing length(cm)                                                                        Wing length (cm)

     31                                                                                                       47

     50                                                                                                       41

     30                                                                                                       41

     31                                                                                                       37

     42                                                                                                       30

     37                                                                                                       34

     50                                                                                                       35

     45                                                                                                       31

     41                                                                                                       33

     50                                                                                                       31

     45                                                                                                       37

     31                                                                                                       47

     48                                                                                                       44

     39                                                                                                       33                                    47                                                                                                 35

     48                                                                                                       37

      50

47

46

39

42

46