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 test statistic for the difference between the two population means is
Definitions:
American Public Health Association
A professional organization dedicated to improving public health and achieving equity in health status.
Changing Conditions
The dynamic nature of situations, environments, or circumstances that are in a state of flux.
Recognition Rewards
Acknowledgments or incentives given to individuals or groups for their achievements and contributions, often used as a motivational strategy in various settings.
Appropriate Culture
A culture or environment that is suitable and fitting for its members, respecting their needs, values, and norms.
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