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
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The process of making the most or best use of resources, opportunities, or capabilities.
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A principle referring to the right of a people to determine their own destiny or governance.
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A professional who applies social work theories and practices to assist individuals, families, and communities in resolving challenges and improving well-being.
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