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An engineering research center claims that through the use of a new computer control system, automobiles should achieve, on average, an addition 3 miles per gallon of gas. A random sample of 100 automobiles was used to evaluate this product. The sample mean increase in miles per gallon achieved was 2.4, and the sample standard deviation was 1.8 miles per gallon. Test the hypothesis that the population mean is at least 3 miles per gallon. Find the p-value for this test, and interpret your findings

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