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A truefalse 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’s score on the test.
1Find E(S)
2Find SE(S)
3Find (no approximations, please) P(S=0)
 11 months ago
 11 months ago
A truefalse 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’s score on the test. 1Find E(S) 2Find SE(S) 3Find (no approximations, please) P(S=0)
 11 months ago
 11 months ago

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FibonacciChick666Best ResponseYou've already chosen the best response.0
so what is the probability that they get the first question right?
 11 months ago

FibonacciChick666Best ResponseYou've already chosen the best response.0
and just the next questions probability?
 11 months ago

dinakarBest ResponseYou've already chosen the best response.0
can any one ans for 2nd question SE(S)
 11 months ago

NuraliBest ResponseYou've already chosen the best response.1
Thanks @CarlosGP ur answer is right thanks
 11 months ago

dan815Best ResponseYou've already chosen the best response.0
what does E(S) mean and SE(S) mean
 11 months ago

OlesBest ResponseYou've already chosen the best response.1
Hi! E(S)=0  correct SE(S)=4.4721359  correct for P(S=0)  please to try "0.1762"  for this one i am not shure
 11 months ago

NuraliBest ResponseYou've already chosen the best response.1
0.1762 is correct answer.
 11 months ago
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