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A comment on Higher math proficiency test: An extended-problem-solving skill evaluation tool. Parent comment

Re:Higher math proficiency test: An extended-problem-solving... by SamReidHughes on Saturday July 25, 2020 @02:26PM (#23951343)
It looks like the "correct" answer was supposed to be "2.2 and 5.8" -- another poster mentioned the server sends answers to the client. But P(X=3 or X=4 or X=5) is .598.

It looks like they used the normal cdf approximation of the Bernoulli distribution, which would give .6857.

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Re:Higher math proficiency test: An extended-problem-solving... by tromp on Monday July 27, 2020 @04:25AM (#23963194)
That is some horrible approximation then! The closest range sum to 68% is for {3,4,5,6} summing to 70%, but even if available as an answer, the only correct answer remains "none of the above".
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