Exhibit 10-3
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. 
-Refer to Exhibit 10-3. The 95% confidence interval for the difference between the two population means is
Definitions:
Northern Areas
Geographic regions located in the northern part of countries or continents, often characterized by specific climatic, ecological, or cultural attributes.
Differential Reproductive Success
The variation in reproductive success between individuals or genetic variants in a population, contributing to natural selection.
Population Growth
The increase in the number of individuals in a population, often measured by birth rate minus death rate plus net migration.
Evolution by Natural Selection
The process by which organisms change over time as a result of changes in heritable physical or behavioral traits, allowing them to survive and reproduce in a given environment.
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Q128: Refer to Exhibit 13-9. If you