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For Quantity 1 : Time taken for the first 180 km = 180 ÷ 60 = 3 hours Time taken for the remaining 180 km = 180 ÷ 90 = 2 hours Total time = 3 + 2 = 5 hours Quantity 1 = 5 hours For Quantity 2 : Time taken for the first 225 km = 225 ÷ 50 = 4.5 hours Time taken for the remaining 225 km = 225 ÷ 75 = 3 hours Total time = 4.5 + 3 = 7.5 hours Quantity 2 = 7.5 hours Correct option : b) Quantity 1 < Quantity 2
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:
Following two statements are related to regression coefficient
(I) Independent of the change of origin
(II) Independent of the change of scale
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For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
If the random sample of size n is drawn without replacement from a finite population of size N, the correction factor for standard error of sample mean...
Two data set of size 9 and 6 have standard deviation 3 and 4 respectively and arithmetic means 3 and 3 respectively. The standard deviation of combined...
The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
X:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â...
The grouped data for the observation are as follows.
Class :Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2-4Â Â Â Â Â Â Â Â 4-6Â Â Â Â Â Â Â Â Â 6-8...
Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is: