Question: uestion Completion Status: A Moving to another question will save this response. > estion 5 10 points Save Answer A shipping firm suspects that the

uestion Completion Status: A Moving to another question will save this response. > estion 5 10 points Save Answer A shipping firm suspects that the mean life of a certain brand of tire used by its trucks is more than 40,000 miles. To check the claim, the firm randomly selects and tests 18 of these tires and gets a mean lifetime of 40503 miles with a standard deviation of 1200 miles. At a = 0.05, test the shipping firm's claim. Assume the distribution is normal. Use the P-value method. Exact value of the standard deviation is not known. O P= 0.047 Reject claim OP=0.038 Reject claim O P= 0.184 Support claim OP=0.231 Support claim > Moving to another question will save this response. P F Ed

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