It is known that number of customer complaints follows the normal distribution (1.33, 0.93). Enterprises are training customer service to reduce the number of complaints. After training, randomly selected 15 days for testing. The average number of complaints was 1.28. Use these sample data to test whether the number of complaints is signicantly reduced? Is there enough evidence to reject the claim at (I = 0.05? Renee-CQUPT 62