0% 0 Statistics Quiz 12 1 / 50 We use normal distribution when ?n? is________________? Small Fixed Large None 2 / 50 In a standard normal distribution z = 0 corresponds to _____________? S.D. Q.D. Mean M.D. 3 / 50 The most repeated (popular) value in a data set is called___________? Mean Geometric Mean Mode Median 4 / 50 If r, between u = x and y = -x is _______________? 0 Non of these 1 -1 5 / 50 If bxy = byx = r then ________________? 6x < 6y Non of These 6y < 6x 6x = 6y 6 / 50 In a Poisson probability distribution __________________? The probability of success is always greater than 5 The number of trials is always less than 5 it always contains a contingency table The mean and variance of the distribution are same (equal) 7 / 50 Coefficient of variation (C.V) is given below:_________________? Mean/S.D. S.D./Mean x 100 Mean/S.? D. x 100 S.D./Mean 8 / 50 f1x12 + f2x22 + ?????+ fxx42=___________? ?ni-1 ? ixi2 ?pi=1 ? ixi2 ?u1=1 ? ixi2 ?mi=1 ? ixi2 9 / 50 Wilcoxon Rank-Sum test can be of_______________? Lower tailed Upper tailed None of the above Either of the above 10 / 50 Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ? Exactly Approximately normal because of the central limit theorem Approximately normal because the sample size is small relative to the population size None of these alternatives is correct 11 / 50 Since E(X) _______X is said to be unbiased estimator of the population mean? Ux Q u X 12 / 50 In normal distribution u2 = S2 and u4 =___________? 4S2/x 3S2 3S 3S4 13 / 50 Type II error is committed when the null hypothesis is _________________? Rejected when it is false Accepted when it is true Rejected when it is true Accepted when it is false 14 / 50 The probability of getting exactly two heads when two balanced coins are toss once_________________? 44231 44259 44290 44200 15 / 50 For a normal distribution having ? = 241 and ? = 2 P (X?235) is:_______? 0.5 0.9986 0.475 0.235 16 / 50 Dependence of difference on statistics is for_______________? Short run Two reasons Three reasons Natural Sciences 17 / 50 In testing for the difference between two populations, it is possible to use____________? The Sign test The Wilcoxon Rank-Sum test Either of the above None of the above 18 / 50 The mean of 5,5,5,5,5 is ______? 10 5 1 6 19 / 50 In binomial experiment, the successive trials are _____________? constant Dependent Related independent 20 / 50 The smallest and the largest value of any given class of a frequency distribution are called ___________? Mid point Class interval Class marks Class limit 21 / 50 A characteristics that does not change is called______________? variable None of these Attribute Constant 22 / 50 The sum of p and q is always:___________________? 1 2 None of these 0 23 / 50 condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ? N(1 ? p) > 5 2 n 5 n > 30 None 24 / 50 Qon means _________ for the given year? Commodity Quantity Index Price Quantity in current 25 / 50 The class ___ are obtained when we divide the sums of the lower and upper class limits by 2? Limit Marks Points Class boundary 26 / 50 Binomial distribution is positively skewed when ______________? p > q p < q P/q P = q 27 / 50 A parameter is a measure which is computed from___________? Population data Sample data Test statistics None of these 28 / 50 Which of the following test must be two-sided ? Wilcoxon Signed Rank Runs test Sign test Kruskal-Wallis 29 / 50 The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation ? 0.483 0.604 0.357 0.278 30 / 50 Two attributes are associated if expected frequency is ____________________? Equal to observed None of these Less than observed Greater than observed 31 / 50 Which of the following is simple hypothesis___________________? u ? 20 u = 20 u 20 None 32 / 50 G.M. are set of ?n? values product of the nth roots of the ______________? None of these Zero reject All +ve, -Ve value Given value 33 / 50 In a binomial distribution, n = 20 and p = 3/5, then variance of this distribution ______________? 12 0 4.8 60 34 / 50 The lack of uniformity is called ______________? X= 5 Skewness variation Lack 35 / 50 The degree of peakedness is called__________________? Symmetry Kurtosis Skewness Dispersion 36 / 50 __________ deviation taken from A.M. is always equal to zero? Mean Average Sum 2.D. 37 / 50 Given X1=12,X2=19,X3=10,X4=7, then summation of X equals? 36 None of these 41 48 38 / 50 An estimator Q is an unbiased estimator of the population parameter Q if ___________________? E(Q) =Q E(Q) =Q E(x) = ? E(P) = P 39 / 50 If the standard deviation of the values 2,4,6,8 is 2.33, then the standard deviation of the values 4,6,8,10 is_____________? 2.33 0 2.58 4.66 40 / 50 The second moment about mean is _____? S.D. Variance Mean Mode 41 / 50 If any value in the data is zero, then which of the following average vanishes_________? None of these A.M. G.M. H.M. 42 / 50 Which of the following test is most likely assessing this null hypothesis: Ho The number of violations per apartment in the population of all city apartments is binomially distributed with a probability of success in any one trial of P=0.3 dd ? The Kruskal-Wallis test The Wilcoxon Signed Rank test The Kolmogorove-Simirnor test The Mann-Whitney test 43 / 50 The sum of deviations of observations is zero, when deviations are taken from __________? Mode Mean Median None of these 44 / 50 An index number is used______________? To measure changes in quantity To measure changes in demand To measure changes in price To measure changes in a variable over time 45 / 50 Which of the following is not a correct statement about a Probability _________________? It must have a value between 0 and 1 A value near 0 means that the event is not likely to occur/happens It can be reported as a decimal or a fraction It is the collection of several experiment 46 / 50 if we connect the mid point of rectangles in a histogram with a series of lines, we get __________ Interval Frequency Polygon Frequency curve Mid point 47 / 50 Mean deviation is always ________________? Negative Less than S.D. Equal to S.D. More than S.D. 48 / 50 Power of test is denoted by _______________? ? ? (1 ? ? ) (1 ? ?) 49 / 50 Coded method of calculation is only used in ___________? None of these Median A.M. Combined mean 50 / 50 Normal distribution is a probability distribution of _____ random variable? Constant Normal Discrete Continuous Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevStatistics Quiz 11 Statistics Quiz 13Next
