10. Imagine that a probability of getting 90 and above on any given exam in this...
10. Imagine that a probability of getting 90 and above on any given exam in this STATS course is 5%. What is the probability that you will get 90% or above on all the three exams?
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10. Imagine that a probability of getting 90 and above on any
given exam in this...
A multiple-choice exam offers five choices for each question. Jason just guesses the answers, so he has probability 1/5 of getting any one answer right. One of your math major friends tells you that t...
A multiple-choice exam offers five choices for each question. Jason just guesses the answers, so he has probability 1/5 of getting any one answer right. One of your math major friends tells you that the assignment of probabilities to the number of questions Jason gets right out of 10 is (rounded to three decimal places):What is the expected number of right answers Jason will get if the test has 10 questions? A) 5 B)2.282 C) 2.493 D) 3.5 E)Can't tell...
6. Suppose that the probability of getting an A in a particular course is 0.08, and...
6. Suppose that the probability of getting an A in a particular course is 0.08, and assume that the all student grades are independent. If you randomly sample 20 students taking the course; a) Find the expected number of students that will get an A, and the standard deviation of number of students that will get an A. (b) Find the probability that no student gets an A. c) Find the probability that at most 2 students get an A...
6. Suppoee that the probability of getting an A in a particular course is 0.08, and...
6. Suppoee that the probability of getting an A in a particular course is 0.08, and assume that the all student grades are independent. If you randomly sample 20 students taking the course (a) Find the expected number of students that will get an A, and the standard deviation of number of students that will get an A. (b) Find the probability that no student gets an A. (e) Find the probability that at most 2 students get an A....
You can take a final exam k times. The probability that you pass the exam is...
You can take a final exam k times. The probability that you pass the exam is 2/3 at each attempt. Considering that you take the exam k times, what is the expected number of exams you take considering that you pass the exam. What is the right approach to solving this problem? I had this on an exam recently and I couldn't figure it out. Any help would be appreciated
Scores in an exam to measure understanding of probability before a class is taught at a...
Scores in an exam to measure understanding of probability before a class is taught at a university have an average of 35 with standard deviation 5. After the course is taught, the average exam score is 80 with standard deviation 6. There is a correlation between the pre-class and post-class score of 0.7. The scores are jointly distributed according to the bivariate normal distribution. (a) What is the probability that the post-course score (the score after the course has been...
Suppose 3 TAs will grade the final exam. Assume they are named Tı, T2, T3. The...
Suppose 3 TAs will grade the final exam. Assume they are named Tı, T2, T3. The time it takes each of them to grade an exam is an exponential random variable, but with different parameters: the TA Ti grades the exams at a rate oft exams an hour Assume that the time to grade any exam is independent of the time to grade the other exams. Each exam is assigned to a uniformly random TA (a) (5 points) If X...
I feel test for a new exam was given to randomly selected seniors the exam was...
I
feel test for a new exam was given to randomly selected seniors the
exam was graded and then sample mean and simple standard deviation
we are calculated based on the results of the exam creator claims
that on the same exam nine times out of 10 the seniors will have an
average score within 3% and 70% of the coefficients interval was
90% 95% of 99% what is the margin of error calculate the confidence
interval and explain what...
There are 30 students in this class, and for Exam 1 everyone has been given a...
There are 30 students in this class, and for Exam 1 everyone has been given a choice for Exam 1. If no one takes Exam 1 then everyone will get a 100. If one person takes exam 1, then all exams will be graded and you will earn whatever grade you got on the exam whether you took it or not. Sally decides to not take the exam thinking option 1 for a 100 was a sure thing. She received...
Grading Policy In addition to three in-class tests and a final exam, the final grade will...
Grading Policy In addition to three in-class tests and a final exam, the final grade will include assessment of homework, quiz projects/classroom activities, and classroom participation, according to the following weights 1. Homework and Worksheets 2. Three Tests 3. Final Exam 4. Quizzes and Class Participation/Classroom Citizenshi 1 5% 40% 25% 20% Total 100% Grad Ran 92 100 90-91 88-89 82-87 80-81 an 78 -79 70-77 68 -69 66 67 60- 65 Assignment Grading: Each written assignment, except the Final...
The professor of a introductory calculus class has stated that, historically, the distribution of final exam...
The professor of a
introductory calculus class has stated that, historically, the
distribution of final exam grades in the course resemble a Normal
distribution with a mean final exam mark of μ=63μ=63% and a
standard deviation of σ=9σ=9%.
If using/finding zz-values, use three decimals.
(a) What is the probability that a random chosen
final exam mark in this course will be at least 73%? Answer to four
decimals.
(b) In order to pass this course, a student must
have a...
6. Suppose that the probability of getting an A in a particular course is 0.08, and assume that the all student grades are independent. If you randomly sample 20 students taking the course; a) Find the expected number of students that will get an A, and the standard deviation of number of students that will get an A. (b) Find the probability that no student gets an A. c) Find the probability that at most 2 students get an A...
6. Suppoee that the probability of getting an A in a particular course is 0.08, and assume that the all student grades are independent. If you randomly sample 20 students taking the course (a) Find the expected number of students that will get an A, and the standard deviation of number of students that will get an A. (b) Find the probability that no student gets an A. (e) Find the probability that at most 2 students get an A....
Suppose 3 TAs will grade the final exam. Assume they are named Tı, T2, T3. The time it takes each of them to grade an exam is an exponential random variable, but with different parameters: the TA Ti grades the exams at a rate oft exams an hour Assume that the time to grade any exam is independent of the time to grade the other exams. Each exam is assigned to a uniformly random TA (a) (5 points) If X...
I
feel test for a new exam was given to randomly selected seniors the
exam was graded and then sample mean and simple standard deviation
we are calculated based on the results of the exam creator claims
that on the same exam nine times out of 10 the seniors will have an
average score within 3% and 70% of the coefficients interval was
90% 95% of 99% what is the margin of error calculate the confidence
interval and explain what...
Grading Policy In addition to three in-class tests and a final exam, the final grade will include assessment of homework, quiz projects/classroom activities, and classroom participation, according to the following weights 1. Homework and Worksheets 2. Three Tests 3. Final Exam 4. Quizzes and Class Participation/Classroom Citizenshi 1 5% 40% 25% 20% Total 100% Grad Ran 92 100 90-91 88-89 82-87 80-81 an 78 -79 70-77 68 -69 66 67 60- 65 Assignment Grading: Each written assignment, except the Final...
The professor of a
introductory calculus class has stated that, historically, the
distribution of final exam grades in the course resemble a Normal
distribution with a mean final exam mark of μ=63μ=63% and a
standard deviation of σ=9σ=9%.
If using/finding zz-values, use three decimals.
(a) What is the probability that a random chosen
final exam mark in this course will be at least 73%? Answer to four
decimals.
(b) In order to pass this course, a student must
have a...
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