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A student is making independent random guesses on a test. The probability the student guess correctly...
A student is making independent random guesses on a test. The probability the student guess correctly is 0.25 for each question. Assume that the guesses are independent. Find the probability of 2 or more are correct in 10 guesses.
A student is making independent random guesses on a test. The probability the student guesses correctly is 0.50 for each question. Assume that the guesses are independent. Find the probability of more than half of the questions correct in 14 guesses.
Find the probability of answering the first 3 questions on a test correctly if random guesses are made, assume that all the questions are multiple choice, each with 5 possible answers.
Assume that random guesses are made for six multiple choice questions on an SAT test, so that there are n equals 6 trials, each with probability of success (correct) given by p equals 0.25. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
5.2.17-T Question Help Assume that random guesses are made for seven multiple choice questions on an SAT test, so that there are n=7 trials, each with probability of success (correct) given by p=0.25. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(X<4) =O (Round to four decimal places as needed.)
assume that random guesses are made for nine multiple choice questions on an SAT test, do that there are n=9 trials, each with probability of success (correct) given by p= 0.65. 5.2.17-T Question Help Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are n=9 trials, each with probability of success (correct) given by p=0.65. Find the indicated probability for the number of correct answers Find the probability that the number...
Suppose that each student has probability p of correctly answering a question chosen at random from a universe of possible questions. (A strong student has a higher p than a weak student.) The correctness of answers to different questions are independent. Jodi is a good student for whom p = 0.82. Use 4 decimal places. (a) Use the normal approximation to find the probability that Jodi scores 77% or lower on a 100-question test. (b) If the test contains 250...
A student takes a true-false test consisting of 15 questions. Assume that the student guesses at each question and find the probability that a. the student gets at least one question correct. b. the student gets a 80 % or better on the exam.
Take a guess: A student takes a multiple-choice test that has 12 questions. Each question has five choices. The student guesses randomly at each answer. Let X be the number of questions answered correctly. (a) Find P(5
Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n = 8 trails, each with probability of sucsess (correct) given by p = 0.65 . Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.