Major car manufacture wants to test a new catalytic to determine whether it meets new air pollution standards. The mean emission of all converters of this type must be less than 20 parts per million of carbon. 10 converters are manufactured for testing purpose and their emission levels are measured with a mean of 17.17 and a standard deviation of 2.98. Calculate the appropriate test statistic to test the hypothesis.

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Major car manufacture wants to test a new catalytic to determine whether it meets new air pollution standards. The mean emission of all converters of this type must be less than 20 parts per million of carbon. 10 converters are manufactured for testing purpose and their emission levels are measured with a mean of 17.17 and a standard deviation of 2.98. Calculate the appropriate test statistic to test the hypothesis.

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