STAT 122/224 0% 0 Created by Oladeji Timilehin Daramola STA 122/224 NOTE: The quiz is meant for revision purpose only! Join the 100 level group to access other quiz CLICK TO JOIN Join the 200 level group to access other quiz CLICK TO JOIN 1 / 25 Two events ,A and B are mutually exclusive and each have a non zero probability .If event A is known to occur ,the probability of the occurrence of event B is One any positive value Zero any value between 0 and 1 2 / 25 Generally, ordinal variables are best displayed visually with: cumulative percentages. collapsed values. pie charts. bar graphs 3 / 25 Sample space is defined as Set of all experimental outcomes Set of some experimental outcomes Set of one experimental outcomes None of the above 4 / 25 Find the co- efficient of variation of a variable whose mean is 10 and variance is 15% 50% 25% 36% 5 / 25 The variance measures deviation around the : mode. median. mean. sum of squares. 6 / 25 Suppose P(A_{1}∩A_{2})=0. Suppose further that P(A_{1})=0.60,P(A_{2})=0.40 ,P(B|A_{1})=0.70 and P(B|A_{2})=0.20.Find P(A_{1}|B). 0.42 0.12 0.28 0.84 7 / 25 What is the class mark of a class whose upper limit is 11.5 and lower limit is 7.2? 18.7 9.35 4.3 -3.4 8 / 25 How many eras do we have in history of design of experiments? Two Three Four Five 9 / 25 A fair die is thrown twice and the two outcomes are added. What is the probability of getting an odd number? Hint: There are 36 outcomes in all. 1/36 2/36 18/36 1 10 / 25 Statistics is the study of the following: collection or design of data presentation and organization of data All of the above 11 / 25 Sample space is itself an Event Subject Probability Statistics 12 / 25 The expected value of X having binomial distribution with parameters n and p is np n/p p/n 1/(np) 13 / 25 A random variable y has a pdf given below f(y)=k(y^{2}+4) for 0 3/13 3/12 7/13 7/12 14 / 25 The measure that deals with the spread of the data is known as measure of Location Dispersion Skewness Data 15 / 25 Suppose that we have a samples pace S={E1,E2,E3},where E1,E2 and E3 denote the experimental outcomes and the following probability assignments are given for the sample events P(E1)=0.3,P(E2)=0.25,P(E3)=0.45.LetA={E1,E2}.Find P(A). 0.55 0.30 0.75 0.90 16 / 25 R^{2 }is the statistical notation for Pearson’s Co-efficient of Correlation The Co-efficient of Variation Spearman’s Co-efficient of Rank Correlation The Co-efficient of Determination 17 / 25 Examples of Designs of Experiment are except----------- Completely randomized block design Randomized block design Organized block design Response surface design 18 / 25 Sample space has probability. 0.0 0.5 1.0 None of the above 19 / 25 With the help of histogram we can draw frequency polygon frequency distribution all of the above 20 / 25 Tay-Sachs disease is a rare but fatal disease of genetic origin occurring chiefly in infants and children, especially those of eastern European extraction. If a couple are both carriers of Tay Sachs disease, a child of theirs has probability 0.25 of being born with the disease. If such a couple has four children, what is the probability that all the children will have the disease ? 0.4 0.04 0.004 0.0004 21 / 25 How many ways can four children be lined up? 16 4 12 24 22 / 25 µ and β are examples of statistic parameters statistics values None of the above 23 / 25 Suppose two events E and F with non-zero probabilities are mutually exclusive. Then E and F are independent E and F are dependent All of the above D.None of the above 24 / 25 A die is rolled and a coin is tossed, find the probability that the die shows an odd number and the coin shows ahead. 1 1/6 1/3 1/4 25 / 25 A couple decides to have children until either (i)they have both a boy and a girl or (ii)they have three children .What is the set of outcomes? Write B for boy ,G for girl ,and write them in birth order. (BG,GGG,BB,GB,BBB,GGB) (BG,GB,BBG,BBB,GGB,GGG) (BG,GB,GGG,BBB) (BG,GB,GGB,BBG) Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Send feedback