A personnel manager has found that, historically, the scores on aptitude tests given to applicants for entry-level positions follow a normal distribution with standard deviation 23.65 points. A random sample of 10 test scores from the current group of applicants had a mean score of 72.62 points. Based on these sample results, a statistician found for the population mean a confidence interval extending from 59.6817 to 85.5583 points. Find the confidence level of this interval. Round off your answer to two decimal places, and report your answer as a number between 0 and 1