a tobacco company states that its product contains less than 5 parts per million of arsneic. an anti tobacco group says that it has tested this claim. they say they tested 400 samples and found 5.5 parts per million of arsenic with σ of 3.88. the group used α of .10. The group concluded that the tobacco company is understanding the arsenic content. test the claim. show all necesary steps. what are some errors that could have happened that would make the result invalid?




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