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Unformatted text preview: 9. The Healthy Food Company claims that its cereal boxes contain, on average,
453 grams of cereal. We suspect that the cereal boxes contain, on average, less than
claimed. You decide to test the claim by inspecting 6 randomly selected boxes, and get
the following weights:
454, 447, 452, 446, 450, 445. Assume that the amount of cereal in a box follows a normal distribution. (a) Formulate the null and the alternative hypotheses. (b) Which statistic should be used to test these hypotheses? Evaluate it numerically.
(c) Formulate the rejection rule at 5% signiﬁcance level. Using your computation in
(b), decide whether the null hypothesis should be rejected. (d) At which of...
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