Practice Welfare Economics Questions and Answers

• The average working hours per month of the staff aged over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean work...
• The Mean deviation about Median for the given data. 52, 56, 66, 70, 75, 80, 82 is:
• For a random variable x, the central moments (µi) of all order exist. The square of (2j + 1)th   moment (µ22j+1) is ...
• The memory-less property is followed by which of the following continuous distribution:
• If the random sample of size n is drawn without replacement from a finite population of size N, the correction factor for standard error of sample mean wil...
• The Excess Kurtosis of the Geometric distribution with parameter p is: ...
• Let (Xi, I ≥ 1} be independent and identically distributed random variables with P(Xi =1) = p = 1-P(Xi = 0), Sn = ∑ni = 1 X i . The distribution of Sn ...
• Which one is parameter from population?
• For the given figures of production of a sugar factory, the estimate of the production for 1976 using straight line trend with origin at the year 1972 by t...
• Which of the following methods is NOT used in computation of a seasonal index for time series?
• The second and fourth moment about mean for a distribution are 4 and 18 respectively. What is the value of Pearson's coefficient of skewness β ₂ ? ...
• For the study purpose, the mean of the observations is 148 gm and standard deviation is 17.4 gm. Approximately, the coefficient of variation equals to:
• The variance of degenerate random variable is:
• Statistics is not applicable to ________ observation.
• The mode (correct to two decimal places) for the given data is:
• Which of the following is NOT a way of the sampling?
• Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is:
• A Poisson distribution has a double mode at x = 1 and x = 2. The probability for x = 1 or for x = 2 of these two values is:
• With reference to index numbers, which of the following statements is true?
• If a discrete random variable X follows uniform distribution and assumes only the values 8, 9, 11, 15, 18, 20, the value of P(|X-14| < 5) will be:
• Marshall-Edgeworth Index number:
• The curve obtained by joining the points, whose x-coordinates are the upper limits of the class interval and y-coordinates are corresponding cumulative fre...
• The probability density function of a random variable X is f(x) = ( π /10) sin ( π x /5) ; 0 ≤ x ≤ 5. The first quartile of X is:
• 60% of the employees of a company are college graduates. Of these, 10% are in sales. Of the employees who did not graduate from college, 80% are in sales. ...
• By the method of moving averages, the seasonal index for four quarters equals to: ...
• 28 If r ₁₂ = +0.80, r13 = -0.40 and r23 = -0.56, then the square of multiple correlation coefficient (correct to four decimal places) R21.23 is equal t...
• If the multiple correlation coefficient of X1 on X2 and X3 is zero, then: ...
• The null hypothesis in ANOVA one-way classification, the study of the variances due to k different sources, is: ...
• The limits of multiple correlation coefficient R1.23 are:
• Second differencing in time series can help to eliminate which trend? (I) Quadratic trend (II) Linear trend
• The probability of getting 9 cards of the same suit in one hand at a game of bridge is ...
• Which of the following is NOT an approach for assigning the probability of the event?
• A B and C are three mutually exclusive and exhaustive events associated with a random experiment. If P(B) = (3/2) P(A) and P(C) = (1/2) P(B) then value of ...
• If Laspeyres price index of a commodity is 208 and Passche's price index of the same commodity is 52, the value of Fisher index number will be:
• Following two statements are related to regression coefficient (I) Independent of the change of origin (II) Independent of the change of scale  
• For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
• ...