A researcher selects a random sample of 58 mice from her laboratory. For each mouse, she records the weight of the mouse in grams and whether the mouse prefers Brand A or Brand B food. She would like to know if there is convincing evidence that mouse weight is associated with food preference. Let = 0.10. The observed and expected counts are displayed in the tables. Observed counts: Expected counts: Which of the following contributed the most to the value of the χ2 statistic? average weight and Brand A average weight and Brand B not average weight and Brand A not average weight and Brand B

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A: z-score for sample mean: From the given information,   n=16 µ=100 σ=32 x-bar=127   Therefore,

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A:

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A:

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A: A B   7 18   14 15   5 22   11 9   8 22   10 8   11 22   8 14   9 16   14 19…

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A:

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Q: 70 vi=1 Xi 1406, Σο1x. = 29042 i=D1

A: From the provided information,

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A: Given: n=16SSxx=26.92SSyy=104.00SSxy=-50.40

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A: From the provided information,

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Q: (a) Find t. (Give your answer correct to two decimal places.)  This answer is 2.46 (ii) Find the…

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A: GIVEN DATA  μ1 = 8.2μ2 = 6.6μ3 = 3.5μ4 = 8.1 σ12 = σ22 =σ32 =σ42 = 1 P(1A1 +  2A2  +  1A3. + 3A4 ≤…

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A: n = 80 Sample proportion = 20/80 = 0.25

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