Which of the following is a sources of primary data?
The correct answer is B
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:
If X and Y represent waiting time and service time of customers in shopping mall, have joint destiny f(x, y) = kx; 0 ≤ y ≤ x ≤ 1, then the value ...
The mean and median of the distribution is 12 and 15. Then the mode equals to:
Recession in industry is associated with the:
With which characteristic movement of a time series would you associate increasing demand of smaller automobiles?
The first four moments of a distribution about the origin are -1.5,17,-30 and 108. The third moment about the mean is:
By the method of moving averages, the seasonal index for four quarters equals to:
For an experiment we have the following data set: n = 4, ∑ X = a,∑ Y = 10,∑ XY = 21,∑ X2 = 30,∑ Y2 = 30 the correlati...
The grouped data for the observations are
Class: 1-3 3-5 5-7
If the first, second and third moment about origin are 2, 8 and 14. respectively, then Karl Pearson gamma coefficient of skewness y1 is:
