A Chemistry teacher teaches a large class of high school students. She knows from past experience...

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A Chemistry teacher teaches a large class of high school students. She knows from past experience that the students' marks are normal with mean 70 and variance 144. Her approach to grading is to impose standards that will yield 14% A's, 20% B's, 32% C's, 20% D's and 14% F's. (a) What mark does one have to attain to get an A in her class? (b) What is the cut off mark between the C's and D's? A Chemistry teacher teaches a large class of high school students. She knows from past experience that the students' marks are normal with mean 70 and variance 144. Her approach to grading is to impose standards that will yield 14% A's, 20% B's, 32% C's, 20% D's and 14% F's. (a) What mark does one have to attain to get an A in her class? (b) What is the cut off mark between the C's and D's?

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a To find the mark needed to get an A in the class we need to find the score that corresponds to the ... View the full answer