Thomas Delivery has a fleet of 24 trucks that are utilizedfor the companies; business. Electro-Lite a manufacturer of sparkplugs claims that its spark plugs have an average life in excessof 25000 miles. The purchasing agent at Thomas Delivery purchased24 sets and found that the sample average life was 26300 milesthe sample standard deviation was 1500 miles and the computedtest statistic was t = 3.423. Based on these findings at the 0.05level is there enough evidence to accept the manufacturersclaim?A. Electro-Lite claims cannot be supported or denied with the testresults.B. Electro-Lite claims are just an advertising promotion.C. Electro-Lite claims are supported; the spark plugs do exceed themean of 25000 miles.D. Electro-Lite claims are not supported by the test results
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