The contingency table shows the results of a random sample of endangered and threatened species b

The contingency table shows the results of a random sample of endangered and threatened species b

The contingency table shows the results of a random sample of endangered and threatened species by status and vertebrate group. At a = 0.01, test the hypothesis that the variables are independent.

Status

Mammals

Birds

Reptiles

Amphibians

Fish

Endangered

162

143

38

17

45

Threatened

18

16

19

10

32

 

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