The data below are drawn from four independent populations: 
Test at the 1% significance level to determine whether the population locations differ.
Definitions:
Injected Membrane
Typically refers to a membrane or tissue that appears red due to an increased blood supply, often as a response to inflammation or infection.
Oblique Position
A body position where the individual is lying on their side with the body angled so that the front is neither completely exposed nor completely hidden.
Thick and Opaque
Descriptive terms indicating something dense and not allowing light to pass through, often used in reference to materials or fluids.
Cerumen Impaction
The accumulation and hardening of earwax in the external ear canal, which can lead to hearing loss and discomfort.
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