2. A professor gives a twenty question true/false quiz. The lowest passing quiz score is 12...
A history professor decides to give a 15-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses onevery question is less than 0.10. What score should be set as the lowest passing grade?
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 40% of the questions correct. (Round your answer to three decimal places.)
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 60% of the questions correct. (Round your answer to three decimal places.)
A teacher gives an unannounced, three-question true false pop quiz, with two possible answers to each question. Complete parts (a)-(C) below. 2. Use a tree diagram to show the possible response patterns, in terms of whether any given response is correct or wrong. Choose the correct answer below. ОА OB OC OD C w w How many outcomes are in the sample space? There are outcomes in the sample space. b. An unprepared student guesses all the answers randomly. Find...
A student takes a 20-question, true/false exam and guessed on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20.
A literature professor decides to give a 15 question true- false quiz. If a student takes this quiz just by blind guessing, what the probability that he/she could get exactly 10 answers correctly?
A student takes a 10 question true-false quiz, but did not study and randomly guesses each answer. Let X be the number of questions answered correctly. a) The variable X is binomially distributed with n = and p = b) Find the mean of X. c) Find P(X = 10). Round your answer to 5 decimal places. d) Find P(X ≥ 7). Round your answer to 5 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?
A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of a randomly chosen student. Find the mean score and interpret the result. Round the answers to two decimal places as needed. 5 6 7 9 10 P(x) 0.08 0.18 0.35 0.22 0.11 0.06 8 to Excel х The mean is If we were to give this quiz to more and more students, the mean score for these students would...
A quiz consists of 980 true or false questions. If the student guesses on each question, what is the mean number of correct answers? O 490 196 980 00 245 None of these