A school administrator wants to see if there is a difference in the number of students per class for Portland Public School district (group 1) compared to the Molalla School district (group 2). A random sample of 25 Portland classes found a mean of 33 students per class with a standard deviation of 4. A random sample of 26 Molalla classes found a mean of 35 students per class with a standard deviation of 3. Assume all conditions are met for inference. Find a 99% confidence interval in the difference of the means. ( , ) Round to 1 decimal place Interpret the confidence interval in context: Round all values to 1 decimal place We are % confident that the difference in sample mean class size between Portland and Molalla is between and