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Since the distance travelled by a boy (going to school and coming back from school) is equal. So, average speed = 2xy/(x + y) Average speed = (2 x 85 x 40)/(85 + 40) Average speed = (2 x 85 x 40)/125 = 54.4 km/hr
If Laspeyres price index of a commodity is 208 and Passche's price index of the same commodity is 52, the value of Fisher index number will be:
Which of the following is a sources of primary data?
The mean and median of the distribution is 12 and 15. Then the mode equals to:
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:
The grouped data for the observation are as follows.
Class : 2-4 4-6 6-8...
For ANOVA table
the F - statistics is:
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
The median of the following observations 10, 11, 9, 12, 10,10, 12, 10, 9,11 is:
