Practice Welfare Economics Questions and Answers

• Which of the following approaches does multiplicative model have for the component of Time series Secular trend (7). Seasonal variation (S), Cyclical fluct...
• Let x and y be two variables with variance as 1990 and 796 with 11 and 9 number of observations respectively. The value of F(10, 8) at 5% level of signific...
• If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:
• Let MSA defines mean sum of squares due to factor A and MSE defines mean sum of squares due to error. If the null hypothesis of ANOVA for one way classific...
• If Z1, Z2,…Zn are n independent standard normal variates, then Σni=1 Z2i will follow:
• The incomes of the employees in a state is assumed to be normally distributed with mean ₹15,000 and variance ₹900. The median of the distribution of th...
• For a normal distribution, which of the following is true?
• The second quartile for the following data 38, 39, 40, 52, 59, 67, 73, 77, 149, 248 is:
• With reference to analysis of variance. which of the following statements is/are correct? (I) Change of origin will affect the value of F (II) Change of ...
• Which of the following is a sources of primary data?
• For a distribution with mean, median, mode and standard deviation 25, 24, 26 and 5 respectively, Karl Pearson's coefficient of skewness equals to:
• If xi | fi , i = 1,2,...n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equal to:
• At a reservation counter. passengers are arriving for booking the tickets in a Poisson fashion with mean rate 60 per hour. The kurtosis of the inter-arriva...
• Completely randomized design is based on the principles of _________ and randomization only.
• Completely Randomized Design provides maximum number of degree of freedom for the:
• At a round table, n persons are seated on n chairs. The probability that two friends from same college are sitting next to each other, is:
• The first four moments of a distribution about the origin are -1.5,17,-30 and 108. The third moment about the mean is:
• A dice was thrown 400 times and 'six' resulted 80 times. The data is used to justify the hypothesis of an unbiased dice at 95% confidence. With reference t...
• The sample sizes for two cases were 15 each with means as 104 and 114 respectively and variances as 200 and 510 respectively. Let the null hypothesis is t...
• The variation among the observations of each specific class is known as:
•   X and Y are independent normal variables with mean 50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution of X+...
• The coefficient of correlation is the _________ of coefficients of regression.
• Which of the following satisfies the time and factor reversal test?
• For a distribution, mean is 40, median is 40.5 and mode is 41. The distribution is:
• The following observations 14, 19, 17, 20, 25 constitute a random sample from an unknown population with mean u and standard deviation σ. The point estim...
• The mean deviation from an average A will be minimum, if A represents:
• A man pedals cycle from his house to his office at a speed of 10 km/h and back from the office to his house at a speed of 15 km/h. His average speed (in km...
• For a distribution, the mean is 10, variance is 16, Y1 is +1 and β2 is 4. The distribution is: