A Set of Final Examination Grades in a Calculus Course

question 76

Multiple Choice

A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard deviation of 9.What proportion of students scored between 81 and 89?

• A).0668
• B).0132
• C).0786
• D).0529

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Definitions:

Cyanobacteria

Photosynthetic microorganisms, also known as blue-green algae, that are key players in nitrogen fixation and oxygen production in various ecosystems.

Lichens

Symbiotic associations between a fungus and a photosynthetic partner, typically an alga or cyanobacterium, living together in a mutualistic relationship.

Horizontal Gene Transfer

The movement of genetic material between unicellular and/or multicellular organisms other than by the "vertical" transmission of DNA from parent to offspring.

Transformation

Taking up of extraneous genetic material from the environment by bacteria.