Quality control, part 2. A company advertises that its premium mixture of nuts contains 10% Brazil nuts,

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Quality control, part 2.

A company advertises that its premium mixture of nuts contains 10% Brazil nuts, 20%

cashews, 20% almonds, 10% hazelnuts, and that the rest are peanuts. You buy a large can and separate the various kinds of nuts. Upon weighing them, you find there are 112 grams of Brazil nuts, 183 grams of cashews, 207 grams of almonds, 71 grams of hazelnuts, and 446 grams of peanuts. You wonder whether your mix is significantly different from what the company advertises.

a) Explain why the chi-square goodness-of-fit test is not an appropriate way to find out.

b) What might you do instead of weighing the nuts in order to use a test?

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Hemstone Ouma

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