Question: The skid properties of regular tires have been tested and a mean skid distance of 155 feet has been established for standardized conditions. A new, more expensive tire has been developed and tests on a sample of 20 new tires yield a mean skid distance of 150 feet with a standard deviation of 07 feet. Because of the cost involved, the new tires will be purchased only if it can be shown at the 99% confidence level that they skid less than the regular tires. Based on this sample, will the new tires be purchased?