statistics

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Settlement of two species of mussel larvae was studied. In a wave exposed location, a
collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave
sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16 of M.
californianus. Test for an association between wave energy and species. Use a 5% level of
significance.

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