A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years 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)
anonymous
 3 years 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)

This Question is Closed

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

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

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

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Thanks @CarlosGP ur answer is right thanks

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

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Hi! 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

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.00.1762 is correct answer.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.