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 Generally, ordinal variables are best displayed visually with: cumulative percentages. collapsed values. pie charts. bar graphs 2 / 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) 3 / 25 Let X be the number of borehole a company drill with a mean of 3 borehole per town in Nigeria .What is the probability that the company drill at least one borehole in a randomly selected town. 0.9000 0.9800 0.5000 0.9502 4 / 25 How many sub committees of 3 people can be chosen from a committee of 8 people? 28 10 16 82 5 / 25 If two variables are absolutely independent of each other the correlation between them must be, -1 0 +1 +0.1 6 / 25 Two events A and B are mutually exclusive if P(A∩B)=1 P(A∪B)=P(A) P(A∩B)=P(A) P(A∩B)=0 7 / 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 8 / 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 9 / 25 Commonly used statistical methodologies in data analysis include Descriptive statistics Inferential statistics All of the above 10 / 25 The measure that deals with the spread of the data is known as measure of Location Dispersion Skewness Data 11 / 25 How many ways can four children be lined up? 16 4 12 24 12 / 25 The volume of water in commercially supplied fresh drinking water containers is approximately Normally distributed with mean 70 litres and standard deviation 0.75 liters.Estimate the proportion of containers likely to contain .P(X>70.9) 0.251% 0.511 0.111 0.1151 13 / 25 Examples of Designs of Experiment are except----------- Completely randomized block design Randomized block design Organized block design Response surface design 14 / 25 An experiment has four equally likely outcomes :E1,E2,E3,andE4.What is the probability that any three of the outcomes occur(e.g.,E1or E2or E4)? 1/24 1/12 1/4 3/4 15 / 25 Statistics is the study of the following: collection or design of data presentation and organization of data All of the above 16 / 25 Probability can be defined as; measure of the likelihood that an event will not occur numerical measure of the likelihood that an event will occur numerical measure of the likelihood that an event will occur None of the above 17 / 25 Suppose P(A)=0.70,P(B)=0.20 and P(A∩B)=0.15.Find P(A∪B) 0.75 0.35 0.85 0.90 18 / 25 Find the co- efficient of variation of a variable whose mean is 10 and variance is 15% 50% 25% 36% 19 / 25 A random variable y has a pdf given below f(y)=k(y2+4) for 0 3/13 3/12 7/13 7/12 20 / 25 A company receives regular deliveries of raw materials from a supplier. The supplies do not always arrive on time. Over the last 100 delivery days ,supplies have been late on 13 occasions .What is the probability that the supplies will be on time on the next delivery day? 1/100 87/100 13/100 0.012 21 / 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 22 / 25 Which of the following is not an example of a ratio scale variable? Age (in days) Speed (in seconds) Height (in inches) Colour of urine 23 / 25 When are events said to be collectively exhaustive ? This is when The compliment of the union of events is the entire sample space The intersection of some of the events is a nullset The union of events is the entire sample space None of the above 24 / 25 An experiment has four equally likely outcomes: E1,E2,E3,andE4.What is the probability that E2 occurs? 1/2 2/4 1/4 1/10 25 / 25 Suppose the mean of scores obtained by students in a test is 14.If a mean of 217 is obtained when the scores are squared, what is the standard deviation of the scores. 14.73 14.25 3.94 4.58 Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Send feedback Like this:Like Loading...
Oladeji Timilehin Daramola
