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9600 × (13/100) × n + 6400 × (11/100) × n = 5472
Or, 1248n + 704n = 5472
So, n = (5472/1952) = 2.8 years
If the first, fifth and ninth decile of frequency distribution xi ∣ fi are 3,10,16, respectively, then Kelly's coefficient of skewness is:
The Mean deviation about Median for the given data.
52, 56, 66, 70, 75, 80, 82 is:
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 r...
If Z follows standard normal distribution with mean 0 and variance 1, then Z2 follows:
The first four moments of a distribution about the origin are -1.5,17,-30 and 108. The third moment about the mean is:
For the ANOVA table
the F - statistics is
For completely randomized design for k treatments and n observations, yif = response from the jth unit receiving ith treatment, �...
The average working hours per month of the staff aged over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean ...
Recession in industry is associated with the:
Which of the following methods is NOT used in computation of a seasonal index for time series?
