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Practice Welfare Economics Questions and Answers

If Z follows standard normal distribution with mean 0 and variance 1, then Z2 follows:
For the following frequency distribution Class : 3-5 5-7 7-9 9-11 ...
If the mean and variance of a binomial distribution are 5 and 4, respectively, then the value of n is:
For an experiment we have the following data set: n = 4, ∑ X = a,∑ Y = 10,∑ XY = 21,∑ X2 = 30,∑ Y2 = 30 the correlation coefficient is -0.8 the...
The grouped data for the observation are as follows. Class : 2-4 4-6 6-8 Frequency:...
If each observation in a data set for number of employees in different divisions is doubled then the coefficient of quartile deviation:
If the first, second, and third moment about the origin are 2, 8, and 18 respectively, then third moment about mean is
For the variables X and Y, we collect 4 observations with ∑ X = 10,∑ Y = 14,∑ X2 = 30,∑ Y2 = 54,∑ XY = 31 The regression line y on x is...
The median of the following observations 10, 11, 9, 12, 10,10, 12, 10, 9,11 is:
For the two variables X and Y, the following observations are tabulated X: 3 4 4 ...
If first, second, and third moment about origin are 1, 6, and 15 respectively, then Karl Pearson beta coefficient of skewness β is
If mean and median of the distribution are 12 and 21, then the distribution
In a two-way ANOVA table the value of x, FA, FB are:
The median of following observations 8, 9, 10, 8, 8, 10, 8, 9 is
For the ANOVA which of the following options is INCORRECT. 1. Null hypothesis H0 : μ1 = μ2 = ... = μn 2. F -ratio belongs to [�...
The Pearson's correlation coefficient between following observation X: 1 2 3 �...
For the ANOVA which option is wro1ng?
From standard pack of 52 cards, 3 cards are drawn at random without replacement. The probability of drawing a king, a queen and a jack in order is
If the second and third moment about the origin are 8 and 18 and the third moment about mean is -14 , then the first moment about the origin is:
For the random variable X with probability density function f(x) = (x−3)2 /5; x = 3, 4, 5, the variance of X is:
If A and B are mutually exclusive, the general addition rule is:
Two random variables X and Y are said to be independent if:
The value of k so that following is probability mass function X: -2 -1 0 �...
If moment generating function of discrete random variable X is (q + pet )n , then E(X2) equals to
The standard deviation of Y is double of standard deviation of X. The correlation coefficient between X and Y is 0.5. The acme angle between lines of regre...
If mean and mode of the distribution is 32 and 21, then the distribution:
To estimate the average work experience of MBA students at a management institute, five students are selected at random from each type of background, say c...
Which of the following options is correct when data is classified on the basis of attributes?
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
The arithmetic mean of the following frequency distribution of number of members in family in the society X: ...
The prices (in Rs.) for the commodity ABC,XYZ, MNO, and IJK in base year (2020) are 20, 18, 12, 24 and in current year (2022) are 25, 22, 15, 28 respective...
The mean and median of the distribution is 12 and 15. Then the mode equals to:
The fair dice is rolled 15 times and face value are noted Face Value: 1 2 3 ...
If the population kurtosis of the observations 16,12,6,2,4,10 is 1.7414, then population kurtosis of the 8,6,3,1,2,5 is
Recession in industry is associated with the:
Which of the following correctly completes the given statement? Index number helps in: (I) determining the cost of living (II) fixing the dearness allowanc...
Which of the following options is INCORRECT?
Which option is incorrect?
If random variable X follows binomial distribution with parameter n and p with mean 15 and variance 10, then the value of mode is
If the first, second and third moment about origin are 2, 8 and 14. respectively, then Karl Pearson gamma coefficient of skewness y1 is:

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