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. If A and B are mutually exclusive events then P(AUB) = P(A)+ P(B)-P(A∩B) P(AUB) = P(A)* P(B) P(AUB) = P(A)+ P(B)- P(A)*P(B) P(AUB) = P(A)+ P(B)2. 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 population parameter. It is a sample statistic. It is a margin of error. It is a standard error.3. A Tyre Company stocks three brands of tyre: brand X; brand Y and brand Z. 40% are Brand X, 35% are brand Y and 25% are brand Z. The percentage of defective tyres are 2% of brand X, 1% of brand Y and 3% of brand Z. If a tyre is picked at random what is the probability that it is defective? 0.019 0.060 0.366 0.0604. Which one of these variables is a binomial random variable? number of CDs a randomly selected person owns time it takes a randomly selected student to complete a multiple choice exam number of women taller than 68 inches in a random sample of 5 women number of textbooks a randomly selected student bought this term 5. Which of the following is not a property of a binomial experiment? each outcome can be referred to as a success or a failure the trials are independent the probabilities of the two outcomes can change from one trial to the next the experiment consists of a sequence of n identical trials6. 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? 0.395 0.148 0.425 0.123 7. 4. Which of the following measures of central tendency tends to be most influenced by an extreme score? None of the above. median mean mode 8. Which one of these variables is a continuous random variable? The time it takes a randomly selected student to complete an exam. The number of women taller than 68 inches in a random sample of 5 women. The number of tattoos for a randomly selected person. The number of correct guesses on a multiple choice test.9. 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 Probabilities are numbers whose values can be from -1 to +1 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 probabilties10. 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: P(A) = 0.2 None of the above. P(A) × P(B) = (0.2)(0.4) = 0.08 P(A)/P(B) = 0.2/0.4 = ½ 11. Nearly all the distributions are special cases of Poisson distribution F None of the above T12. If two events (both with probability greater than 0) are mutually exclusive, then A. They must be independent and could be complement C. They cannot be independent and they cannot be complement D. They cannot be independent and could be complement B. They must be independent and complement13. The number of suicides reported in a particular city will be described by Poisson Distribution Negative Binomial Distribution Normal distribution Binomial Distribution14. 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). 0.20 0.34 0.60 0.40 1.6015. A workforce consists of seven workers. How many different three worker teams is it possible to select? 35 125 70 210 Workspace Thank you for taking - Managerial Statistics Give your best to show up in the board below: [mlw_quizmaster_leaderboard mlw_quiz=6] Share this:FacebookTwitterEmailLinkedIn