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. NameEmail1) If A and B are mutually exclusive events then P(AUB) = P(A)+ P(B) 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)2) which of the following is a correct statement? If two events are dependent, then the probabilty both event will occur is the multiplication of their respective probabilties 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 Probabilities are always whole numbers The total of all the probabilities assigned to all outcomes in a sample space must be equal to 1.03) An experiment consists of making 80 telephone calls in order to sell a particular insurance policy. The random variable in this experiment is a continuous random variable complex random variable none of the above discrete random variable simplex random variable4) Which of the following is not a property of a binomial experiment? the trials are independent 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 failure5) If you are told a population has a mean of 25 and a variance of 0, what must you conclude? All the elements in the population are 25. Someone has made a mistake. None of the above. There is only one element in the population. There are no elements in the population.6) If two events (both with probability greater than 0) are mutually exclusive, then A. They must be independent and could be complement D. They cannot be independent and could be complement B. They must be independent and complement C. They cannot be independent and they cannot be complement7) 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 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. Find the cumulative probability for 8 in a Poisson distribution with n = 20 and p = 0.5.8) 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)/P(B) = 0.2/0.4 = ½ P(A) × P(B) = (0.2)(0.4) = 0.08 P(A) = 0.2 None of the above. 9) Which one of these variables is a continuous random variable? The number of tattoos for a randomly selected person. The number of women taller than 68 inches in a random sample of 5 women. The number of correct guesses on a multiple choice test. The time it takes a randomly selected student to complete an exam. 10) 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). 1.60 0.40 0.34 0.20 0.60 11) 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 0.148 0.395 0.123 12) 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? 0.366 0.060 0.060 0.019 13) 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 margin of error. It is a population parameter. It is a standard error. It is a sample statistic.14) Which one of these variables is a binomial random variable? 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 textbooks a randomly selected student bought this term number of CDs a randomly selected person owns15) 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 1/7 1/49 2/49 4/49 2/7Workspace 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. Sangeeta Ray-10 Points 3. Kevin Jose-10 Points 4. Aaradhya Shukla-10 Points 5. 1420347-10 Points Share this:FacebookTwitterEmailGoogleLinkedIn