Let denote the hourly wage for workers who provide hotel room service in a large city. A 95% confidence interval for based on

Let µ denote the hourly wage for workers who provide hotel room service in a large city. A 95% confidence interval for µ based on a large sample of workers, assuming the wages to have a normal distribution with a known standard deviation, is from $9.50 to $10.90. Use this information for this question and the next one. 

Based on this information, a 90% confidence interval for µ based on this sample (rounded to the nearest $0.10, e. g. 9.46 is 9.50, 9.44 is 9.40, 9.55 is 9.60) is:_____________________________________.