After students were not doing so well in hermath class, Mrs.Smith decided to try a different approach and use verbal positive reinforcement at least once every hour. Use the following results to find a90%90%confidence interval for the true mean change in the students' test scores after Mrs.Smith started using positive reinforcement. Assume that the population distribution of the paired differences is approximatelynormally distributed. Round to onedecimal place.

Student	Without Reinforcement	With Reinforcement
1	58	59
2	72	88
3	46	64
4	66	81
5	58	69
6	55	63