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 one year 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)
 one year 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)

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

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

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

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

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

Oles
 one year ago
Best ResponseYou've already chosen the best response.1Hi! 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

Nurali
 one year ago
Best ResponseYou've already chosen the best response.10.1762 is correct answer.
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