A test consists of 25 multiple choice questions. Each question has 5 possible answers, or which...
A test consists of 25 multiple choice questions. Each question has 5 possible answers, or which only one is correct. If a student guesses on each question, find the following.
a) The probability that he will guess all of them correct
b)The probability that he will guess at most 15 correct.
c)The probability that he will guess at least one correct.
d) The mean and the standard deviation of the number of correct answers.
e)Estimate the probability of the number of correct answers that will fall within 2 standard deviations of the mean.
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A test consists of 25 multiple choice questions. Each question
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An exam consists of 64 independent multiple-choice questions. For each question, there are five choices, with...
An exam consists of 64 independent multiple-choice questions. For each question, there are five choices, with only one being correct. Suppose a student randomly guesses the correct answer to each question. (a) What are the mean and standard deviation of the number of successful guesses? (b) Use the normal approximation to find the probability that the student will correctly guess at most 10 correct answers.
A multiple choice test consists of 60 questions. each question has 4 possible answers of which...
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a multiple choice quiz consists of 20 questions, each of which has five possible answers of...
a multiple choice quiz consists of 20 questions, each of which has five possible answers of which only one is correct. A student passes the quiz if twelve or more correct answers are obtained. what is the probability of passing the quiz if on each question, a student can eliminate two incorrect answers and then guess between the remaining three? (answer format _._ _ _ _ _ _)
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A multiple choice quiz has4 questions. Each question has 5 possible answers, only one of which is correct. A student has not studied for the quiz and guesses randomly on each question. What is the probability that the student gets at least one correct answer? Show your calculation, and write your answer as either a reduced fraction or a decimal rounded to four places.
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(5 points) A multiple-choice examination has 15 questions, each with 5 possible answers only one ...
(5 points) A multiple-choice examination has 15 questions, each with 5 possible answers only one of which is correct. Suppose that one of the students who takes the examination answers each of the questions with an independent random guess. What is the probability that the student answers at least four questions correctly? What is the expected number of questions that the student answers correctly? 4.
(5 points) A multiple-choice examination has 15 questions, each with 5 possible answers only one...
A test consists of 60 multiple choice questions, each with five possible answers, only one of...
A test consists of 60 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean and the standard deviation of the number of correct answers. Round the answers to the nearest hundredth. ООО A. mean: 12.00; standard deviation: 3.10 B. mean: 30.00; standard deviation: 5:48 c. mean: 12.00; standard deviation: 3.46 D. mean: 30.00; standard deviation: 3.10 Click to select your answer.
A multiple-choice examination consists of 75 questions, each having possible choices a, b, c, and d....
A multiple-choice examination consists of 75 questions, each having possible choices a, b, c, and d. Approximate the probability that a student will get more than 18 answers correct if he randomly guesses at each answer. (Note that, if he randomly guesses at each answer, then the probability that he gets any one answer correct is 0.25.) Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not...
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An exam consists of 64 independent multiple-choice questions. For each question, there are five choices, with only one being correct. Suppose a student randomly guesses the correct answer to each question. (a) What are the mean and standard deviation of the number of successful guesses? (b) Use the normal approximation to find the probability that the student will correctly guess at most 10 correct answers.
(5 points) A multiple-choice examination has 15 questions, each with 5 possible answers only one of which is correct. Suppose that one of the students who takes the examination answers each of the questions with an independent random guess. What is the probability that the student answers at least four questions correctly? What is the expected number of questions that the student answers correctly? 4.
(5 points) A multiple-choice examination has 15 questions, each with 5 possible answers only one...
A test consists of 60 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean and the standard deviation of the number of correct answers. Round the answers to the nearest hundredth. ООО A. mean: 12.00; standard deviation: 3.10 B. mean: 30.00; standard deviation: 5:48 c. mean: 12.00; standard deviation: 3.46 D. mean: 30.00; standard deviation: 3.10 Click to select your answer.
A multiple-choice examination consists of 75 questions, each having possible choices a, b, c, and d. Approximate the probability that a student will get more than 18 answers correct if he randomly guesses at each answer. (Note that, if he randomly guesses at each answer, then the probability that he gets any one answer correct is 0.25.) Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not...
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