Aptitude Test Scores
Two random samples of 40 students were drawn independently from two populations of students.Assume their aptitude tests are normally distributed (total points = 100).The following statistics regarding their scores in an aptitude test were obtained: 
.
-{Aptitude Test Scores Narrative} Estimate with 95% confidence the difference between the two population means.
Definitions:
Lead Poisoning
A medical condition caused by high levels of the heavy metal lead in the body, leading to serious health issues including damage to the nervous system.
Tornado Sirens
Warning systems used to alert residents in an area about an approaching tornado, allowing them to seek safety promptly.
Age-Related
Pertaining to changes that occur naturally as part of the aging process.
Physiological Changes
Alterations in the normal functioning of the body, which can be due to aging, environmental factors, disease, or lifestyle choices.
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