A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. 
The 98% confidence interval for the difference between the two population means is
Definitions:
Injury Site
The location on the body where an injury has occurred.
Platelets
Small, disc-shaped cell fragments in the blood that are essential for blood clotting and repair of damaged blood vessels.
Costimulation
A process in immunology where an additional signal provided by one immune cell enhances the activation or survival of another, leading to an effective immune response.
Immune Response
The immune response is the body's defensive reaction to substances or organisms that are identified as foreign or harmful.
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