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Undergraduates' Test Scores 35 undergraduate students who completed two years of college were asked to take a basic mathematics test. The mean and standard deviation of their scores were 75.1 and 12.8, respectively. In a random sample of 50 students who only completed high school, the mean and standard deviation of the test scores were 72.1 and 14.6, respectively {Undergraduates' Test Scores Narrative} Estimate with 90% confidence the difference in mean scores between the two groups of students.
Cases
Instances or occurrences of a particular condition or category being studied in research or documented in various fields such as law or medicine.
Arithmetic Operations
Basic mathematical computations including addition, subtraction, multiplication, and division.
Categorical
Pertaining to data that can be divided into specific groups or categories that are qualitatively distinct.
Categorical Variables
Variables that represent categories with qualitative characteristics, such as gender, race, or yes/no responses, and do not inherently carry a numerical value.
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