0% 0 Statistics Quiz 6 1 / 50 Sampling errors are reduced by:___________________? Decreasing the sample size Increasing the sample size None of these Increasing population s.d. 2 / 50 Second moment about mean is_______________? Variance Standard Deviation Coefficient of Variation None of these 3 / 50 The mean of hypergeometric distribution is:___________________? N-k/n Nk/N nN/k n+k/N 4 / 50 The mean, median and mode for binomial distribution will be equal when:______________? None p= 0.5 P 0.5 p = 1 5 / 50 A random variable X has binomial distribution with n = 10 and p = 0.3 then variance of X is:_____________________? 12 10 21 2.1 6 / 50 The formula ?poqn/?poqo x100 is used to calculate_______________? The Laspeyres quantity index The Paasche price index The Paasche quantity index The Laspeyres price index 7 / 50 If X ? N (?, ?2) then Z ?__________? N(0, 1) N(1, ?2) N(0, ?2) N(1, 1) 8 / 50 The probability of a save event is equal to _________________? One Four Two Three 9 / 50 The relation showing between whole and its components used chart is said to be ___________________? Pie Chart Multiple bar chart Simple Bar chart Component bar chart 10 / 50 The Coefficient of Skewness is always zero for ____________ distribution? All of above Skewed Symmetrical None of these 11 / 50 what is the probability of a type II error when ?=0.05 ? 0.025 0.05 0.95 Cannot be determined without more information 12 / 50 The probability of drawing an even number in a toss of a balanced die ______________? 44202 44233 44353 44261 13 / 50 If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________? 4.66 2.58 0 5 14 / 50 The Mann-Whitney U test is preferred to a t-test when____________? Sample sizes are small Data are paired Sample are dependent The assumption of normality is not met 15 / 50 If ?X? is normally distribution with >?= 8 and S.? D. 4, then P(6?X?10) may be______________? -0.32 1.2 0.2684 0 16 / 50 If X N(55,49) then ? ? 7 55 49 104 17 / 50 The standardized normal variate z means_________ away from the mean? None of these S.D. Variance Mean 18 / 50 Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data? Inferential Statistics Probability Statistics Descriptive Statistics Advanced Statistics 19 / 50 In r x c table for test of Independence the degree of freedom is _____________? r + c ? r ? c ? (r -1) (c -1) rc 20 / 50 Probability distribution of a statistics is called_________________? Data Parameter Sampling Sampling distribution 21 / 50 Average calculated used in index number by __________ method? Two Three Four One 22 / 50 If we increase the sample size, it means that it:_________________? Decreases the Standard error Both (a) and (b) Increases the Standard error Decreases the Standard error 23 / 50 95% confidence limits for P are _________________? P?1.65(pq/n) P?1.96 p2q2/?n P?1.96?p2q2/n P?2.18?p2q2/n 24 / 50 Variance remains unchanged by change of_____________? Scale None of these Both Origin 25 / 50 The lower class boundary of 25-35 will be ______________? 35 25 30 20 26 / 50 H.M. _____ G.M. _______ A.M? ? < > ? 27 / 50 Attributes are _______ if they have some relation? Associated In consistent None of these Disassociation 28 / 50 If a Binomial experiment is repeated ?N? times then binomial frequency distribution is. _______________? N p q N.{n/x}px qn-x N.{n/x}p qn-x N.{nx}px qn-x 29 / 50 Statistics laws are true for______________? Short run Medium period Long run None of these 30 / 50 Binomial distribution has parameters:______________? One Four Three Two 31 / 50 The difference between statistics and parameter is called:______________? Standard Bias both (a) and (b) Sampling error 32 / 50 Mean deviation of Normal Distribution is_____________? 34? 23? 45? 78? 33 / 50 The weighty system changed with _______________? Yearly Timely Averagely Basely 34 / 50 Richness is not a ________________? Discreade Constant Continuous Variable 35 / 50 The mode of the data 2,4,6,6,6,8 is _______________? 30 4 8 6 36 / 50 If X and Y are independent then SD (X ? Y) is________________? SD(X)+SD(Y) SD(X)+SD(Y)??????????????? SD(X)?SD(Y) Var(X)+Var(Y)???????????????? 37 / 50 P95 means _____? The point above below which 95% area lies The point above above which95% area lies Both (a) and (b) but not (c) The central 95% area 38 / 50 Variance of binomial distribution is always:______________? Less than mean Greater than mean Less than equal to mean Equal to mean 39 / 50 The S.D. and variance are ____ of origine? Variance Independent Change Multiplied 40 / 50 Standard deviation of the sampling distribution of a statistics is called_____________? Standard error Serious error Difference Dispersion 41 / 50 Criteria to check a point estimator to be good are_____________? All Above Consistency Efficiency Unbiasedness 42 / 50 According to the empirical rule, approximately what percent of the data should lie within ???? 0.95 0.997 0.9 0.75 43 / 50 The Index number are used to measure seasonal and cyclical variations in ____________? Wholesale Relatives commodities Time series 44 / 50 The minimum variance unbiased estimator of the population mean is _______________? S2/n 6/?n 6x/?n S/?n 45 / 50 If a and b are two constants, then Var(a+bX) is_______________? a?bVar(X) Var(a)?Var(X) b2Var(X) ?bVar(X) 46 / 50 data classified by methods are called __________ data? Row data Grouped data None of these Quantitative data 47 / 50 if f(x1,x2,?xn;?)=g(??;?)h(x1,x2,?.,xn), then ?? is____________? Efficient Unbiased Sufficient Consistent 48 / 50 Which of the following is not an example of a discrete probability distribution ? Whether or no t a home has a swimming pool in it. Non of these The number of bedrooms in a house The sale or purchase price of a house 49 / 50 Total Area under the curve in probability of density function is ? 1 Infinity -1 0 50 / 50 ________ is the simplest means of dispersion? Variation Standard deviation C.V. Range 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 5 Statistics Quiz 7Next
