A Professor at a Local University Noted That the Exam

question 46

Multiple Choice

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a standard deviation of 11. If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?

• A) 70.39
• B) 67.39
• C) 50.39
• D) 65.39

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Definitions:

Calderas

Large, basin-like depressions resulting from the collapse of a volcano after a major eruption.

Magma Chambers

Large pools of molten rock located beneath the Earth's surface, where magma accumulates before it is erupted as lava during a volcanic eruption.

Reef

A structure formed in shallow waters by the growth and deposit of marine organisms such as corals and calcareous algae, providing diverse habitats for marine life.

Transform Fault

A type of fault where two tectonic plates slide past each other horizontally, often causing earthquakes.