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A quality control engineer is in charge of the manufacture of computer disks. Two different processes can be used to manufacture the disks. He suspects that the Kohler method produces a greater proportion of defects than the Russell method. He samples 150 of the Kohler and 200 of the Russell disks and finds that 27 and 18 of them, respectively, are defective. If Kohler is designated as "Group 1" and Russell is designated as "Group 2," which of the following tests will you use to find out if the Kohler method is worse than the Russell method?
Natural Opiates
Substances derived from the opium poppy plant that act on the nervous system to produce pain relief and euphoria.
Hormones
Chemical messengers produced by the endocrine glands that regulate various bodily functions and processes.
Glands
Organs in the body that secrete hormones or other substances directly into the blood or surrounding tissues.
Organs
Structures composed of different tissues that perform specific functions within an organism, such as the heart, liver, or lungs.
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