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In given question the data follows binomial distribution I use
here binomial distribution because n and p(success) given if any
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9. Suppose that you are given a 30 question true-false quiz. Being unprepared you decide to...
Assume you are totally unprepared for a quiz but you decide to take it anyway and...
Assume you are totally unprepared for a quiz but you decide to take it anyway and just guess at all of the answers. The quiz is 12 multiple choice questions each of which have 4 choices (that’s 1/4 chance of getting one right). What is the probability that you will pass the quiz if you need at least 8 questions correct in order to pass? Select one: a. 0.0115 b. 0.0008 c. 0.0004 d. 0.0028
An unprepared student makes random guesses for the ten true-false questions on a quiz
An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at least one correct answer.Could some one please help me?And explain to me how they got the answer?and is there another way besides the tree method?
Several archeology students are unprepared for a surprise true/false test with 13 questions, and all of...
Several archeology students are unprepared for a surprise true/false test with 13 questions, and all of their answers are guesses. Find the mean for the number of correct answers for such students. (Round answer to one decimal place.) μ = Find the standard deviation for the number of correct answers for such students. (Round answer to two decimal places.) σ = Give the range for the usual number of correct answers. (Enter answer as an interval using square-brackets only with...
A literature professor decides to give a 15 question true- false quiz. If a student takes...
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 teacher gives an unannounced, three-question true false pop quiz, with two possible answers to each...
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 quiz consists of 30 true or false questions. If the student guesses on each question,...
A quiz consists of 30 true or false questions. If the student guesses on each question, what is the mean number of correct answers? A.) 0 B.) 15 C.) 6 D.) 30
Suppose a quiz contains 20 true/false questions. You know the correct answer to the first 10...
Suppose a quiz contains 20 true/false questions. You know the correct answer to the first 10 questions. You have no idea of the correct answer to questions 11 through 20 and decide to answer each using the coin toss method. Calculate the probability of obtaining a total quiz score of at least 85%.
A true/false test has 30 questions. A passing grade is 70% or more correct answers. Answer_____(Type...
A true/false test has 30 questions. A passing grade is 70% or more correct answers. Answer_____(Type an integer or a decimal.) a. What is the probability that a person will guess correctly on one true/false question?Answer________ b. What is the probability that a person will guess incorrectly on one question?Answer________ c. Find the approximate probability that a person who is just guessing will pass the test.Answer________ d. If a similar test were given with multiple-choice questions with four choices for...
Several anthropology students are unprepared for a surprise true/false test with 27 questions, and all of...
Several anthropology students are unprepared for a surprise true/false test with 27 questions, and all of their answers are guesses. Find the mean for the number of correct answers for such students. (Round answer to one decimal place.) Find the standard deviation for the number of correct answers for such students. Round answer to two decimal places) Give the range for the usual number of correct answers. Enter answer as an interval using square-brackets only with whole numbers.) usual values...
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer....
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 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...
Several anthropology students are unprepared for a surprise true/false test with 27 questions, and all of their answers are guesses. Find the mean for the number of correct answers for such students. (Round answer to one decimal place.) Find the standard deviation for the number of correct answers for such students. Round answer to two decimal places) Give the range for the usual number of correct answers. Enter answer as an interval using square-brackets only with whole numbers.) usual values...
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