Managerial Statistics Practice testThis entry was posted in Quiz Statistics by Kamal Kishore Instructions for Students: 1- Kindly attempt all the questions, before submitting. 2- For every correct answer, you will get 1 mark. 3- There is no negative marking. 4- Try to submit quiz, before the time runs out. 5- DO NOT REFRESH OR PRESS BACK BUTTON ON YOUR WEB BROWSER. All the best. Name Email 1. A randomly selected sample of 400 students at a university with 15-week semesters was asked whether or not they think the semester should be shortened to 14 weeks (with longer classes). Forty six percent (46%) of the 400 students surveyed answered "yes." Which one of the following statements about the number 46% is correct? It is a sample statistic. It is a margin of error. It is a population parameter. It is a standard error.2. Assuming that Birthdays are uniformly distributed through out the week, the probability that two strangers passing each other on the street were both born on Monday is 2/49 1/49 1/7 2/7 4/493. If two events (both with probability greater than 0) are mutually exclusive, then D. They cannot be independent and could be complement C. They cannot be independent and they cannot be complement A. They must be independent and could be complement B. They must be independent and complement4. Suppose that a quiz consists of 20 True-False questions. A student hasn't studied for the exam and will just randomly guesses at all answers (with True and False equally likely). How would you find the probability that the student will get 8 or fewer answers correct? Find the cumulative probability for 8 in a binomial distribution with n = 20 and p = 0.5. Find the cumulative probability for 8 in a Poisson distribution with n = 20 and p = 0.5. Find the probability that X=8 for a normal distribution with mean of 10 and standard deviation of 5. Find the probability that X=8 in a binomial distribution with n = 20 and p=0.5. 5. TATA Company stocks three brands: brand A; brand B and brand C. 40% are Brand A, 35% are brand B and 25% are brand C. The percentage of defective are 2% of brand A, 1% of brand B and 3% of brand C. If the company selects a product and finds it defective find the probability that it is a brand C product? 0.425 0.395 0.148 0.123 6. Which of the following is not a property of a binomial experiment? the experiment consists of a sequence of n identical trials the probabilities of the two outcomes can change from one trial to the next each outcome can be referred to as a success or a failure the trials are independent7. If A and B are mutually exclusive events then P(AUB) = P(A)* P(B) P(AUB) = P(A)+ P(B) P(AUB) = P(A)+ P(B)-P(A∩B) P(AUB) = P(A)+ P(B)- P(A)*P(B)8. Let A and B be events such that P (A) = 0.7 and P (B) = 0.9. Calculate the largest possible value of P (A ∪ B) − P (A ∩ B). 0.60 0.40 1.60 0.20 0.34 9. 4. Which of the following measures of central tendency tends to be most influenced by an extreme score? median mean None of the above. mode 10. An experiment consists of making 80 telephone calls in order to sell a particular insurance policy. The random variable in this experiment is a simplex random variable discrete random variable continuous random variable complex random variable none of the above11. The number of suicides reported in a particular city will be described by Normal distribution Poisson Distribution Negative Binomial Distribution Binomial Distribution12. Suppose that the probability of event A is 0.2 and the probability of event B is 0.4. Also, suppose that the two events are independent. Then P(A|B) is: None of the above. P(A) = 0.2 P(A) × P(B) = (0.2)(0.4) = 0.08 P(A)/P(B) = 0.2/0.4 = ½ 13. Nearly all the distributions are special cases of Poisson distribution T F None of the above14. which of the following is a correct statement? Probabilities are always whole numbers An event that is certain not to happen has a probability of 1.0 The total of all the probabilities assigned to all outcomes in a sample space must be equal to 1.0 If two events are dependent, then the probabilty both event will occur is the multiplication of their respective probabilties Probabilities are numbers whose values can be from -1 to +115. A workforce consists of seven workers. How many different three worker teams is it possible to select? 125 35 70 210 Workspace Thank you for taking - Managerial Statistics Give your best to show up in the board below: Leaderboard for Managerial Statistics 1. Suraj J-13 Points 2. Dev-11 Points 3. Sangeeta Ray-10 Points 4. Kevin Jose-10 Points 5. Aaradhya Shukla-10 Points Share this:FacebookTwitterEmailGoogleLinkedIn