Question

A multiple choice quiz involves 30 questions, each with 5 alternative answers. Each question is awarded...

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 X are:

Select one:

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A student is taking a multiple-choice quiz in which each question has five possible answers, exactly...
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...
A quiz consists of 15 multiple-choice questions. Each question has 5 choices, with exactly one correct choice. A student, totally unprepared for the quiz, guesses on each of the 15 questions. a. How many questions should the student expect to answer correctly? b. What is the standard deviation of the number of questions answered correctly? c. If at least 7 questions must be answered correctly to pass the quiz, what is the chance the student passes?
. A quiz has 25 multiple choice questions. Each question has 3 possible answers, one of...
. 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 point is taken off for each incorrect answer (a ticket with the value of -1). A student answers all 25 questions by guessing at random. a) Present the problem with an appropriate box model. Find the expected value and the standard error for the sum...
A Student takes a multiple choice Quiz where there are "n" possible answers in each question....
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 correctly?
In a statistics class, Maya takes a multiple-choice quiz. There are 10 questions. Each question has...
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 correct answers. (Round probabilities to 4 decimal places) a. Define the Random Variable, x ~ b. What is the PDF formula? c. Find the probability that Maya answers exactly 4 of the questions correctly?...
On a certain statistics exam, there are 9 multiple choice questions. Each question has 5 possible...
On a certain statistics exam, there are 9 multiple choice questions. Each question has 5 possible answers to choose from (and only 1 correct answer). Suppose you didn’t study at all and are planning on guessing the correct answer for each question. 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 guess at...
A quiz consists of 12 multiple-choice questions. Each question has 5 possible answers, only one of...
A quiz consists of 12 multiple-choice questions. Each question has 5 possible answers, only one of which is correct. Klein plans to guess the answer to each question. Find the probability that Klein gets exactly 7 correct answers. *
A quiz consists of 100 multiple choice questions. Each question has 4 possible answers (A-D) and...
A quiz consists of 100 multiple choice questions. Each question has 4 possible answers (A-D) and only one answer is correct. If the student guesses the answer to the questions, then what is the probability earn a grade of 70% or higher? Show how to on Ti-84 Calculator
a multiple choice quiz in six sigma green belt 11 consists of 10 questions each of...
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 is correct. a student passes the quiz if six or more correct answer obtained. what is the probability of passing the quiz if on each question, a student can eliminate three incorrect answers and then guess between the remaining two.
Consider a multiple-choice examination with 50 questions. Each question has four possible answers. Assume that a...
Consider a multiple-choice examination with 50 questions. Each question has four possible answers. Assume that a student who has done the homework and attended lectures has a 65% chance of answering any question correctly. (Round your answers to two decimal places.) A student must answer 45 or more questions correctly to obtain a grade of A. What percentage of the students who have done their homework and attended lectures will obtain a grade of A on this multiple-choice examination? Use...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT