We dont like to find broken crackers whenwe open the package. How can makers reduce
Chapter 0, Problem 22.44(choose chapter or problem)
We dont like to find broken crackers whenwe open the package. How can makers reduce breaking? One idea is to microwavethe crackers for 30 seconds right after baking them. Analyze the following resultsfrom two experiments intended to examine this idea.16 Does microwavingsignificantly improve indicators of future breaking? How large is theimprovement? What do you conclude about the idea of microwaving crackers?(a) The experimenter randomly assigned 65 newly baked crackers to bemicrowaved and another 65 to a control group that is not microwaved. Fourteendays after baking, 3 of the 65 microwaved crackers and 57 of the 65 crackers inthe control group showed visible checking, which is the starting point for breaks.(b) The experimenter randomly assigned 20 crackers to be microwaved andanother 20 to a control group. After 14 days, he broke the crackers. Here aresummaries of the pressure needed to break them, in pounds per square inch:
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