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pakinam
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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)
 one year ago
 one year ago
pakinam Group Title
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)
 one year ago
 one year ago

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FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.0
so what is the probability that they get the first question right?
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.0
and just the next questions probability?
 one year ago

dinakar Group TitleBest ResponseYou've already chosen the best response.0
can any one reply
 one year ago

dinakar Group TitleBest ResponseYou've already chosen the best response.0
can any one ans for 2nd question SE(S)
 one year ago

Nurali Group TitleBest ResponseYou've already chosen the best response.1
@CarlosGP Find SE(S)
 one year ago

Nurali Group TitleBest ResponseYou've already chosen the best response.1
Thanks @CarlosGP ur answer is right thanks
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
what does E(S) mean and SE(S) mean
 one year ago

Oles Group TitleBest 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
 one year ago

Nurali Group TitleBest ResponseYou've already chosen the best response.1
0.1762 is correct answer.
 one year ago
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