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Let the total work be 60 units. (LCM of 12 and 30) Efficiency of A = 60/12 = 5 units/day Efficiency of B = (60/30) × (70/100) = 7/5 units/day Ratio of the efficiency of A : B = 5 : 7/5 = 25:7 Share of A = (25/32) × 1504 = Rs.1175
For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
The standard error of the given data 15, 5, 12, 10, 20, 4 is
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 sign...
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 sal...
Which one is not non-probability sample method
If first, second, and third moment about origin are 1, 6, and 15 respectively, then Karl Pearson beta coefficient of skewness β is
For making frequency distribution, the number of classes used depends upon:
If A and B are mutually exclusive, the general addition rule 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 dist...
For the discrete distribution, the Pearson's coefficient of skewness β2 is always:
