The mean age for the population of inmates in state correctional facilities is 31.84. Some researchers believe that this may not be the same for some groups of inmates.

In a sample of Native American inmates (n = 112), researchers find a mean age of 33.46 with a standard deviation of 9.62.

1. Please Create a 95% confidence interval around the sample mean value
2. Interpret your confidence interval
3. What would happen if you use 99% level of significance instead of 95%