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A true-false test consists of 20 questions, each of which has one correct answer: true, or false. One point is awarded for every correct answer, but one point is taken off for each wrong answer. Suppose a student answers every question by guessing at random, independently of other questions. Let S be the student¬Ęs score on the test.Find E(S), SE(S), P(S=0)

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    E(S)= 0

    Anyone for SE(S) and P(S=0) ?

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    Thanks FLu!
    Anyone for SE(S) and P(S=0)?

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    Thanks from me Flu

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    Thanks, anyone for the rest?

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    Could anyone tell me the SE(S)?

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    SE(E)- 4.472

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    Thanks Pebble.

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    Thanks Pebble, did someone solves or find the C....... P(S=0)?

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    1.0532687

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