After evaluating customer satisfaction survey data, a computer company finds that one of the main complaints of customers was how long it took to repair computers. They make some changes with the objective of reducing the average time to 5 days. A random sample of 30 computer repairs found a mean of 4.7 days with a standard deviation of 2.3 days. Conduct all five steps of the hypothesis testing process to determine if the company was successful in attaining the proposed mean repair time at 5% significance.