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The deseasonalised time - series data will have only trend (T), cyclical (C) and irregular (I) components and is expressed as:
For the variables X and Y, we collect 4 observations with ∑ X = 10,∑ Y = 14,∑ X2 = 30,∑ Y2 = 54,∑ XY = 31 The regressio...
By the method of moving averages, the seasonal index for four quarters equals to:
The variation among the observations of each specific class is known as:
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 o...
For the distribution with unknown θ
We set the tes...
The grouped data for the observation are as follows.
Class : 2-4 4-6 6-8...
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: