Question

A multiple choice quiz involves 30 questions, each with 5 alternative answers. Each question is awarded 10 marks if the correct answer is chosen, and 0 marks otherwise. Assume that one particular student answers the quiz by guessing, with a 1 in 5 chance of answering any single question correctly, independently of all other questions.

Let * X* be the total number of marks
obtained by this student. The mean and standard deviation of

Select one:

Answer #1

A student is taking a multiple-choice quiz in which each
question has five possible answers, exactly one of which is
correct. He knows 85% of the material being tested. Assume the
teacher has chosen the questions independently and at random from
among all the questions she could have chosen.
When the student knows the correct answer to a given question,
he has a 98% chance of marking it correctly. When he does not know
the answer, he answers by marking...

A quiz consists of 15 multiple-choice questions. Each question
has 5 choices, with exactly one correct choice. A student, totally
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answered correctly? c. If at least 7 questions must be answered
correctly to pass the quiz, what is the chance the student
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. A quiz has 25 multiple choice questions. Each
question has 3 possible answers, one of which is correct. A correct
answer is worth 4 points (a ticket with the value of 4), but a
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a) Present the problem with an appropriate box model.
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A Student takes a multiple choice Quiz where there are "n"
possible answers in each question.
1- The Student answers the question correctly if the Student knows
the answer.
2- The Student answers the question randomly if the Student doesn't
know the answer.
3- Suppose that the Quiz has 20 questions, and that the Student
knows "80%" of the questions correctly.
what is the expected number of questions that the Student will get
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In a statistics class, Maya takes a multiple-choice quiz. There
are 10 questions. Each question has five possible answers. Maya
will pass the test if she studies so that she has a 75% chance of
answering each question correctly. Let x be the number of of
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a. Define the Random Variable, x ~
b. What is the PDF formula?
c. Find the probability that Maya answers exactly 4 of the
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On a certain statistics exam, there are 9 multiple choice
questions. Each question has 5 possible answers to choose from (and
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Therefore, the probability of guessing a question correctly is
___________ . (Round to two decimals)
Let X = number of questions the student guesses
correctly
(Round all answers to four decimals)
a) What’s the probability you
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A
quiz consists of 12 multiple-choice questions. Each question has 5
possible answers, only one of which is correct. Klein plans to
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gets exactly 7 correct answers. *

A quiz consists of 100 multiple choice questions. Each question
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a multiple choice quiz in six sigma green belt 11 consists of 10
questions each of which has five possible answers of which only one
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Consider a multiple-choice examination with 50 questions. Each
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A student must answer 45 or more questions correctly to obtain a
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