A Professor Claims That There Is Only a 15% Chance

question 15

Short Answer

A professor claims that there is only a 15% chance of earning an "A" in her class.At the end of the semester,40 of the 278 students earn "A's." Using n = 278 and p = 0.15,approximate P(X = 40)by using the normal approximation.

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Definitions:

Perspective-taking Problem

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