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zloy xaker [14]
3 years ago
13

Choose the correct simplified expression for (3x-y)(w+p-3)

Mathematics
1 answer:
Ganezh [65]3 years ago
8 0
(3x-y)(w+p-3)
3xw+3xp-9x-yw-yp+3y
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An ornithologist has 4 bird feeders at separate locations. She wonders if birds are equally likely to visit each of the feeders.
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Answer:

the x² test statistic 13.71

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the x² test statistic = ?

X^2_{stat = ∑[ (o_i - e_i)²/e_i]

X^2_{stat = [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]

X^2_{stat = [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]

X^2_{stat = 13.7066 ≈ 13.71

Therefore, the x² test statistic 13.71

Option a) 13.71 is the correct answer.

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