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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:
...

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