O RANDOM VARIABLES AND DISTRIBUTIONS Binomial problems: Advanced A multiple-choice test consists of 8 questions. Each...
O RANDOM VARIABLES AND DISTRIBUTIONS Binomial problems: Advanced The unemployment rate in a city is 14%. If 9 people from the city are sampled at random, find the probability that more than 2 of them are unemployed. Carry your intermediate computations to at least four decimal places, and round your answer to two decimal places (If necessary, consult a list of formulas.) 0 х
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...
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.
O RANDOM VARIABLES AND DISTRIBUTIONS Standard normal values: Advanced Let Z be a standard normal random variable. Use the calculator provided, or this table, to determine the value of c. P(0.6<Z<c)-0.2573 Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places. 1× 5 ? Explanation Check PROBABILITY The curious die A peculiar die has the following properties: on any roll the probability of rolling either a 2, a 5, or a lis just...
A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the probability that the student gets at least a 60 on the test. Give your answer to four decimal places.
Suppose a quiz has 12 multiple choice questions. Each question has 4 answer choices. If a student takes the quiz and randomly guesses on every question.... Find the probability the student gets between 1 and 6, exclusive, questions correct? Find the probability the student gets more than 8 questions correct?
Assume that random guesses are made for multiple-choice questions on a test with choices for each question, so that there were treach with probability of success correct given by 0.20. Find the probability of no correct answers. Click on the icon to view the binomial probability table The probability of no correct answers Round to three decimal places as needed)
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.
Question 7 (4 points) A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the probability that the student gets at least a 60 on the test. Give your answer to four decimal places. x10 11 12 13...
A multiple choice test consists of 10 questions each with four choices (a,b,c,d) for each question. If a student must get at least 7 correct to pass the test, what is the probability that a student could pass the exam simply by guessing? Find your answer to 4 decimal places.