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A consumer research organization states that the mean caffeine content per 12-ounce bottle of a population...

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Statistics

A consumer research organization states that the mean caffeinecontent per 12-ounce bottle of a population of caffeinated softdrinks is 37.8 milligrams. You find a random sample of 48 12-ouncebottles of caffeinated soft drinks that has a mean caffeine contentof 35.2 milligrams. Assume the population standard deviation is12.5 milligrams. At α=0.05, do you support or reject theorganization’s claim using the test statistic?

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