Steve is a student in a statistics course. He is not a good student. A multiple-choice...
Steve is a student in a statistics course. He is not a good student. A multiple-choice test is coming up and he will just rely on luck to pass the test. There are 10 multiple-choice questions on the test, with 5 possible answers given for each question, one of them being the correct one. Steve is going to guess the answer to each question.
What is the probability that Steve gets no answers correct?
What is the probability that Steve gets two answers correct?
What is the probability that Steve fails the test? 50% is the passing mark.
Suppose you have a class full of students like Steve. What would be the average and standard deviation of the class mark?
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Steve is a student in a statistics course. He is not a good
student. A multiple-choice...
A 20 question multiple choice test with 5 possible answers on each question is given to...
A 20 question multiple choice test with 5 possible answers on each question is given to a class and the instructor has promised that any student who gets more than half of the questions correct will pass the test. A student who has not attended the class nor read any of the assignments is hoping to pass the test purely on the basis of guesswork. What is the probability that the student will pass? (Hint: The probability that a guess...
A quiz consists of 6 multiple-choice questions. Each question has 4 possible answers. A student is...
A quiz consists of 6 multiple-choice questions. Each question has 4 possible answers. A student is unprepared, and he has no choice but to guess answers completely at random. He passes the quiz if he gets at least 3 questions correctly. What is the probability that he will pass?
5. A student takes a multiple-choice exam where each question has 5 possible answers. He works...
5. A student takes a multiple-choice exam where each question has 5 possible answers. He works a question correctly if he knows the answer, otherwise he guesses at random. Suppose he knows the answer to 80% of the questions. (a) What is the probability that on a question chosen at random the student gets the correct (b) Given that the student gets the correct answer to this question, what is the probability answer? that he actually knew the answer?
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible...
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible answers only one of which is correct. .If this student guesses on all of the questions what is the probability he gets exactly three correct answers? A) 0.1974 C) 0.2323 B) 0.2825 D) 0.2581 E) 0.1105
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...
Sophia and Heather are two friends who say they have no previous knowledge of statistics. They...
Sophia and Heather are two friends who say they have no previous knowledge of statistics. They are going to take a placement test to see if they should start at the introductory level or not. The placement test is a multiple-choice test with 60 questions. Each question has 4 multiple-choice options with exactly one correct answer. What is the expected number (mean) of correct answers if a student were to randomly guess? (Do not round) What is the standard deviation...
A student answers all 48 questions on a multiple-choice test by guessing. Each question has four...
A student answers all 48 questions on a multiple-choice test by guessing. Each question has four possible answers, only one of which is correct. Approximate the probability that the student gets at least 22 correct answers by using the normal distribution. The probability is:
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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Suppose a teacher gives her statistics class a four question, multiple-choice quiz at the beginning of the semester to measure how well prepared they were for the class 2. 3 and 4 questions correct. Using 0.05, perform a chi-square test to determine if the R ution EEB CI Number of Correct Answers per Student Frequency o C. 10 10 10 40 homial probability distribution What i Total robability distribution nomial probability distibution Print Done H The mean number of correct...
A student takes an exam containing 12 multiple choice questions. Each question has 5 choices. At...
A student takes an exam containing 12 multiple choice questions. Each question has 5 choices. At least 8 correct answers are required to pass. If the student guesses, what is the probability that he will pass? Round your answer to four decimal places.
5. A student takes a multiple-choice exam where each question has 5 possible answers. He works a question correctly if he knows the answer, otherwise he guesses at random. Suppose he knows the answer to 80% of the questions. (a) What is the probability that on a question chosen at random the student gets the correct (b) Given that the student gets the correct answer to this question, what is the probability answer? that he actually knew the answer?
5) A student takes a multiple choice test with 12 questions, Each question has 4 possible answers only one of which is correct. .If this student guesses on all of the questions what is the probability he gets exactly three correct answers? A) 0.1974 C) 0.2323 B) 0.2825 D) 0.2581 E) 0.1105
A student answers all 48 questions on a multiple-choice test by guessing. Each question has four possible answers, only one of which is correct. Approximate the probability that the student gets at least 22 correct answers by using the normal distribution. The probability is:
Suppose a teacher gives her statistics class a four question, multiple-choice quiz at the beginning of the semester to measure how well prepared they were for the class 2. 3 and 4 questions correct. Using 0.05, perform a chi-square test to determine if the R ution EEB CI Number of Correct Answers per Student Frequency o C. 10 10 10 40 homial probability distribution What i Total robability distribution nomial probability distibution Print Done H The mean number of correct...
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