1. In a history class, students take a weekly multiple choice quiz consisting of 6 questions,...
1.
In a history class, students take a weekly multiple choice quiz consisting of 6 questions, each with 4 possible answers. If a student randomly guesses at the answer to each question for every quiz, then what is the mean number of correct answers the student will get on each quiz?
Round your answer to one decimal place as necessary. For example, 4.5 would be a legitimate entry.
2. There is no prior information about the proportion of Americans who support the gun control in 2018. If we want to estimate 90% confidence interval for the true proportion of Americans who support the gun control in 2018 with a 0.38 margin of error, how many randomly selected Americans must be surveyed?
(Round up your answer to nearest whole number)
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In a history class, students take a weekly multiple choice quiz
consisting of 6 questions,...
There is no prior information about the proportion of Americans who support the gun control in...
There is no prior information about the proportion of Americans who support the gun control in 2018. If we want to estimate 95% confidence interval for the true proportion of Americans who support the gun control in 2018 with a 0.2 margin of error, how many randomly selected Americans must be surveyed? (Round up your answer to nearest whole number)
A nationwide school examination in history included several multiple-choice questions. Each question had 4 possible answers,...
A nationwide school examination in history included several multiple-choice questions. Each question had 4 possible answers, only one of which was correct. In a sample of 1000 students from more than 100000 students who participated in the test it was found that 38% answered the first multiple- choice question correctly. Assume that if a student knew the answer to this question then with 100 percent chance he chose the right answer. If a student didn't know the answer, he tried...
A multiple choice quiz has4 questions. Each question has 5 possible answers, only one of which...
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.
Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has...
Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all ten questions, find the indicated probabilities. (Round your answers to three decimal places.) What is the probability that he will answer all the questions correctly the answer is 0.000 My question is how did they get...
Richard has been given a 7-question multiple-choice quiz in his history class. Each question has three...
Richard has been given a 7-question multiple-choice quiz in his history class. Each question has three answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. Assuming that Richard guesses on all 7 questions, find the probability that he will answer no more than 4 questions correctly. Round your answer to the nearest thousandth. Select one: a. 0.19 b. 0.128 c. 0.571 d. 0.5 e. 0.955
Richard has been given a 7-question multiple-choice quiz in his history class. Each question has three...
Richard has been given a 7-question multiple-choice quiz in his history class. Each question has three answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. Assuming that Richard guesses on all 7 questions, find the probability that he will answer no more than 4 questions correctly. Round your answer to the nearest thousandth. Group of answer choices c. 0.955 d. 0.19 b. 0.571 a. 0.128 e. 0.5
Richard has been given a 12-question multiple-choice quiz in his history class. Each question has four...
Richard has been given a 12-question multiple-choice quiz in his
history class. Each question has four answers, of which only one is
correct. Since Richard has not attended the class recently, he
doesn’t know any of the answers. The success occurs if Richard
answers a question correctly and the failure occurs if Richard is
unable to answer a question correctly. Assuming that Richard
guesses on all 12 questions, find the probability that he will
answer no more than 3 questions...
a quiz consists of 20 multiple-choice questions. each with 4 choices but only 1 answer, while...
a quiz consists of 20 multiple-choice questions. each with 4 choices but only 1 answer, while a student decided to randomly guess all the answers in the quiz. 1. find the probability for passing the quiz when the passing grade is 60% 2. find the probability to get the first correct answer within the first 3 attempts 3. find the expected number of attempts to get the first correct answer
A short quiz has two true-false questions and one multiple-choice question with four possible answers. A...
A short quiz has two true-false questions and one multiple-choice question with four possible answers. A student guesses at each question. Assuming the choices are all equally likely and the questions are independent of each other, the following is the probability distribution of the number of answers guessed correctly. What is the Probability of getting less than all three right? X 0 1 2 3 P(X) .1875 .4375 .3125 .0625 Group of answer choices a) 1.0000 b) .9375 c) .6250 d) .3125
Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has...
Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all ten questions, find the indicated probabilities. (Round your answers to three decimal places.) (a) What is the probability that he will answer all questions correctly? (b) What is the probability that he will answer all questions...
A nationwide school examination in history included several multiple-choice questions. Each question had 4 possible answers, only one of which was correct. In a sample of 1000 students from more than 100000 students who participated in the test it was found that 38% answered the first multiple- choice question correctly. Assume that if a student knew the answer to this question then with 100 percent chance he chose the right answer. If a student didn't know the answer, he tried...
Richard has been given a 12-question multiple-choice quiz in his
history class. Each question has four answers, of which only one is
correct. Since Richard has not attended the class recently, he
doesn’t know any of the answers. The success occurs if Richard
answers a question correctly and the failure occurs if Richard is
unable to answer a question correctly. Assuming that Richard
guesses on all 12 questions, find the probability that he will
answer no more than 3 questions...
Richard has just been given a 10-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all ten questions, find the indicated probabilities. (Round your answers to three decimal places.) (a) What is the probability that he will answer all questions correctly? (b) What is the probability that he will answer all questions...
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