At What Angle Must a Fish Underwater Look in Order

question 92

Multiple Choice

At what angle must a fish underwater look in order to see a fisherman at the shore? (Note:
N for water is 1.33.)

• A) 41.2°
• B) 48.8°
• C) 60.0°
• D) 36.9°
• E) 90.0°

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A default hypothesis that there is no effect or no difference, and it's the assumption to be tested in statistical analysis.

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