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Question $7$ of $21$

Many birds are injured or killed by flying into windows. It appears that birds do not see windows. Can tilting windows down so that they reflect earth rather than sky reduce bird strikes? Researchers placed six windows at the edge of a woods: two vertical, two tilted downward $20$ degrees, and two tilted downward $40$ degrees. During the next four months, there were $53$ bird strikes: $31$ on the vertical windows, $14$ on the $20-$degree windows, and eight on the $40-$degree windows.

Why is a chi$-$square procedure appropriate? Sort the statements into those that are true for the above data and are also conditions for the chi$-$square procedure, and those that are false. Make sure you sort all the tokens into either the true or false category.

Answer Bank

The deviations of observed counts from expected counts are not too small.

All observations are independent.

Question Source: Baldi $4$e $-$ The Practice of Statistics In The Life Sciences $|$ Publisher: W$.$H$.$ Freeman