An instructor gives his class a set of 16 problems with the information that the next...
An instructor gives his class a set of 16 problems with the information that the next quiz will consist of a random selection of 6 of them. If a student has figured out how to do 11 of the problems, what is the probability that he or she will answer correctly A) all 6 problems? B) at least 5 problems?
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An instructor gives his class a set of 16 problems with the information that the next...
(1 point) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection or 7 of them. If a student has figured out how to do 12 of the...
(1 point) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection or 7 of them. If a student has figured out how to do 12 of the problems, what is the probability the he or she will answer correctly (a) all 7 problems? (b) at least 6 problems?
(1 point) An instructor gives his class a set of 18 problems with the information that the next...
An instructor gives her class the choice to do 8 questions out of the 11 on...
An instructor gives her class the choice to do 8 questions out of the 11 on an exam. (a) How many choices does each student have? (b) How many choices does a student have if he/she must answer at least 4 of the first 6 questions? If 9 teachers are to be divided among 5 schools. (a) How many divisions are possible? (b) What if each school must receive two teachers?
A professor gives a list of 10 problems and tells his students that the exam will...
A professor gives a list of 10 problems and tells his students that the exam will consist of 4 of the problems selected at random. If a student knows how to solve 6 of the problems, what is the probability that the student will make a perfect score on the exam? What is the discrete probability distribution used for this problem?
Problem 1.3. Albert announces to his class that he plans to surprise them with a quiz...
Problem 1.3. Albert announces to his class that he plans to surprise them with a quiz sometime next week. His students first wonder if the quiz could be on Friday of next week. They reason that it can't: if Albert didn't give the quiz before Friday, then by midnight Thursday, they would know the quiz had to be on Friday, and so the quiz wouldn't be a surprise any more. Next the students wonder whether Albert could give the surprise...
An instructor wants more students in his 8:00 am class to participate. He hypothesizes that giving...
An instructor wants more students in his 8:00 am class to participate. He hypothesizes that giving students a cup of coffee at the start of class will do the trick. The first 20 students who enter the classroom are given a cup of coffee (the experimental group), and the last 20 students are not (the control group). What (if anything) is problematic about the way students were assigned to the groups, and how should the instructor have assigned participants to...
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...
Richard has just been given a 4-question multiple-choice quiz in his history class. Each question has...
Richard has just been given a 4-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended class recently, he doe know any of the answers. Assuming that Richard guesses on all four 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...
on d. If a teacher wants to increase a class test average of 62 to 70,...
on d. If a teacher wants to increase a class test average of 62 to 70, what could he or she do to each student's test score to achieve that? Add Doints to each student's to increase the cererage of scores from 42 7. a. A student scores 50 and 100 on two tests in a class. What is his average? 5oo Hoo - 150 - 75 b. Another student scores 75 and 75 on two tests in a class....
a. Ms. Newell gave her class a 10-question multiple-choice quiz with 4 choices. Let X =...
a. Ms. Newell gave her class a 10-question multiple-choice quiz with 4 choices. Let X = the number of questions that a randomly selected student in the class answered correctly. The mean and standard deviation of X are 7.6 and 1.32 respectively. To determine each student’s grade on the quiz, Ms. Newell will multiply his or her number of correct answers by 10. Let RV ‘G’ be the grade of a randomly chosen student in the class. i. Calculate the...
One Management professor adopted a crossword puzzle exercise in his introductory management information systems (MIS) class,...
One Management professor adopted a crossword puzzle exercise in his introductory management information systems (MIS) class, because he believes that the most important effects of engaging in a crossword exercise is the great workout it gives one’s brain—solving crossword puzzles requires several skills, such as spelling, reasoning, making inferences, evaluating choices, and drawing conclusions. That is, the exercise may enhance one’s ability to memorize words. He wants to know whether or not the crossword puzzle exercise can accelerate the learning...
(1 point) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection or 7 of them. If a student has figured out how to do 12 of the problems, what is the probability the he or she will answer correctly (a) all 7 problems? (b) at least 6 problems?
(1 point) An instructor gives his class a set of 18 problems with the information that the next...
Problem 1.3. Albert announces to his class that he plans to surprise them with a quiz sometime next week. His students first wonder if the quiz could be on Friday of next week. They reason that it can't: if Albert didn't give the quiz before Friday, then by midnight Thursday, they would know the quiz had to be on Friday, and so the quiz wouldn't be a surprise any more. Next the students wonder whether Albert could give the surprise...
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...
Richard has just been given a 4-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended class recently, he doe know any of the answers. Assuming that Richard guesses on all four 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...
on d. If a teacher wants to increase a class test average of 62 to 70, what could he or she do to each student's test score to achieve that? Add Doints to each student's to increase the cererage of scores from 42 7. a. A student scores 50 and 100 on two tests in a class. What is his average? 5oo Hoo - 150 - 75 b. Another student scores 75 and 75 on two tests in a class....
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