you walked into class to discover you had a statistics exam for which you had not...
you walked into class to discover you had a statistics exam for which you had not prepared. because the test is multiple choice with 5 possible answers for each question with only one of those choices being correct, you decide to take your chances and guess. the test has 20 questions: A) what is the probability that you will get 5 out of 20 questions correct? B) what is the probability you will get no questions correct? c) what is the probability that you will get 5 out of 20 questions correct? B) what is the probability you will get at least one question correct?
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you walked into class to discover you
had a statistics exam for which you had not...
Suppose you forget to study for an exam. The exam is multiple choice and has one...
Suppose you forget to study for an exam. The exam is multiple choice and has one correct answer of 4 possible choices. Suppose that the exam contains 20 questions of which you guess on every one. a. What is the probability that you get exactly 10 questions correct by guessing? b. What is the probability that you get at most 1 question correct by guessing? c. What is the probability that you get at least 1 question correct by guessing?...
If you're taking a multiple-choice exam where each question has 5 options (a–e), and you have...
If you're taking a multiple-choice exam where each question has 5 options (a–e), and you have to randomly guess on 4 questions, what is the probability that you get at least 3 of those questions correct?
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions...
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions that you have no clue how to answer. You would have known the answers if you had taken the time to study the night before instead of going to a party, but you did not make a good life choice, and you vow to never party on a school night again if you fail this exam. Each question on the exam is multiple choice...
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions...
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions that you have no clue how to answer. You would have known the answers if you had taken the time to study the night before instead of going to a party, but you did not make a good life choice, and you vow to never party on a school night again if you fail this exam. Each question on the exam is multiple choice...
Suppose you are taking an exam that only includes multiple choice questions. Each question has four...
Suppose you are taking an exam that only includes multiple choice questions. Each question has four possible choices and only one of them is correct answer per question. Questions are not related to the material you know, so you guess the answer randomly in the order of questions written and independently. The probability that you will answer at most one correct answer among five questions is ?
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 is taking a multiple-choice exam in which each question has two choices. Assuming that...
A student is taking a multiple-choice exam in which each question has two choices. Assuming that she has no knowledge of the correct answers to any of the questions, she has decided on a strategy in which she will place two balls (marked Upper A and Upper BA and B) into a box. She randomly selects one ball for each question and replaces the ball in the box. The marking on the ball will determine her answer to the question....
4. (30 points) A statistics exam has five easy questions and three hard questions. You have...
4. (30 points) A statistics exam has five easy questions and three hard questions. You have six friends who are in the class, five are moderately prepared and one is very prepared. Probability Easy Questions Correct 80% Chance 95% Probability Hard Questions Correct 66.666% (two-thirds) 5 Moderately Prepared Friends 1 Very Prepared Friend 80% The probability of answering any one question correctly is completely independent of the probability of answering any other question correctly for every student. (a) What is...
Consider a multiple choice exam of 20 questions. Suppose each question has four choices and only...
Consider a multiple choice exam of 20 questions. Suppose each question has four choices and only one of them is correct. If a student is going to guess answers, what is the probability that he answers i.) all questions correctly? ii.)more than 10 questions correctly? iii.)more than 5 and less than 10 correctly? iv.) How many Questions do you expect him to answer correctly?
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...
Suppose you forget to study for an exam. The exam is multiple choice and has one correct answer of 4 possible choices. Suppose that the exam contains 20 questions of which you guess on every one. a. What is the probability that you get exactly 10 questions correct by guessing? b. What is the probability that you get at most 1 question correct by guessing? c. What is the probability that you get at least 1 question correct by guessing?...
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions that you have no clue how to answer. You would have known the answers if you had taken the time to study the night before instead of going to a party, but you did not make a good life choice, and you vow to never party on a school night again if you fail this exam. Each question on the exam is multiple choice...
Exercise 3.10. Guessing on an exam. While taking a probability exam, you come to three questions that you have no clue how to answer. You would have known the answers if you had taken the time to study the night before instead of going to a party, but you did not make a good life choice, and you vow to never party on a school night again if you fail this exam. Each question on the exam is multiple choice...
4. (30 points) A statistics exam has five easy questions and three hard questions. You have six friends who are in the class, five are moderately prepared and one is very prepared. Probability Easy Questions Correct 80% Chance 95% Probability Hard Questions Correct 66.666% (two-thirds) 5 Moderately Prepared Friends 1 Very Prepared Friend 80% The probability of answering any one question correctly is completely independent of the probability of answering any other question correctly for every student. (a) What is...
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