College Admissions Administrators at a University Are Reevaluating Their Entrance

question 38

Multiple Choice

College admissions administrators at a university are reevaluating their entrance requirements.They believe that the mean GPA for graduating high school seniors has increased dramatically over the last decade.They randomly sample 85 records of graduating seniors from 10 years ago (sample 1) and find an average GPA of 2.68.An independent random sample of 80 current graduating seniors yields an average GPA of 2.94.If the population variance of high school GPAs is 0.2601, find a 95% confidence interval for the difference in population mean GPA over the last decade.

• A) (-0.42, -0.10)
• B) (-0.29, -0.13)
• C) (-0.36, -0.16)
• D) (-0.46, -0.05)

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Definitions:

Equilibrium

A state of balance or stability within a system, often referring to physical balance or chemical reactions.

Inner Ear

The innermost part of the ear, containing organs responsible for hearing and balance.

Otoscopic Examination

A medical procedure using an otoscope to visually inspect the ear canal and tympanic membrane, commonly for diagnosing infections or conditions.

Helix

A type of smooth curve, resembling a spring, which can be found in various natural and man-made structures.