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Els Testing Test The maximum acceptable level of a certain toxic chemical in vegetables has...

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Els Testing Test The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0 4 parts per million ppm A consumer health group measured the level of the chemical in a random sample of tomatoes obtained from one producer The levels in ppm are shown below 0 31 0 47 0 19 0 72 0 56 0 91 0 29 0 83 0 49 0 28 0 31 0 46 0 25 0 34 0 17 0 58 0 19 0 26 0 47 0 81 Does the data provide sufficient evidence to support the claim that the mean level of the chemical in tomatoes from this producer is greater than the recommended level of 0 4 ppm Use a 0 05 significance level to test the claim that these sample levels come from a population with a mean greater than 0 4 ppm Use the P value method of testing hypotheses Assume that the standard deviation of levels of the chemical in all such tomatoes is 0 21 ppm Choose the correct test statistic and P value associated with this experiment Test statistic z 0 95 P value 0 1711 Test statistic z 0 95 P value 0 1711

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