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. Which of the following is not a property of a binomial experiment? the probabilities of the two outcomes can change from one trial to the next the experiment consists of a sequence of n identical trials the trials are independent each outcome can be referred to as a success or a failure2. 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 1/49 4/49 2/49 2/7 1/73. 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 P(A)/P(B) = 0.2/0.4 = ½ None of the above. P(A) × P(B) = (0.2)(0.4) = 0.08 4. If two events (both with probability greater than 0) are mutually exclusive, then C. They cannot be independent and they cannot be complement A. They must be independent and could be complement D. They cannot be independent and could be complement B. They must be independent and complement5. If you are told a population has a mean of 25 and a variance of 0, what must you conclude? None of the above. There are no elements in the population. There is only one element in the population. Someone has made a mistake. All the elements in the population are 25.6. 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? 0.060 0.060 0.366 0.019 7. Which one of these variables is a continuous random variable? The number of tattoos for a randomly selected person. The time it takes a randomly selected student to complete an exam. The number of correct guesses on a multiple choice test. The number of women taller than 68 inches in a random sample of 5 women. 8. Nearly all the distributions are special cases of Poisson distribution T F None of the above9. 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? 0.123 0.395 0.425 0.148 10. A workforce consists of seven workers. How many different three worker teams is it possible to select? 125 210 70 35 11. 4. Which of the following measures of central tendency tends to be most influenced by an extreme score? mode median None of the above. mean12. Which one of these variables is a binomial random variable? number of textbooks a randomly selected student bought this term number of women taller than 68 inches in a random sample of 5 women time it takes a randomly selected student to complete a multiple choice exam number of CDs a randomly selected person owns13. The number of suicides reported in a particular city will be described by Binomial Distribution Negative Binomial Distribution Poisson Distribution Normal distribution14. 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 probability that X=8 for a normal distribution with mean of 10 and standard deviation of 5. Find the cumulative probability for 8 in a Poisson distribution with n = 20 and p = 0.5. Find the probability that X=8 in a binomial distribution with n = 20 and p=0.5. Find the cumulative probability for 8 in a binomial distribution with n = 20 and p = 0.5.15. 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 0.60 0.40 1.60 0.34 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:FacebookTwitterEmailGoogleLinkedIn