Question
A boat can travel 18 km downstream in 2 hours and 12 km
upstream in 3 hours. What is the speed of the boat in still water?Solution
Speed downstream = Distance/Time = 18/2 = 9 km/hr Speed upstream = Distance/Time = 12/3 = 4 km/hr Speed of boat in still water = (Downstream speed + Upstream speed) / 2 = (9 + 4) / 2 = 13/2 = 6.5 km/hr Correct Option: a) 6.5 km/hr
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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Which one is not basis of classification of data.
For making frequency distribution, the number of classes used depends upon:
Which option is incorrect?
Which of the following is the most relevant for deriving a point estimate?
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...
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The coefficient of correlation is the _________ of coefficients of regression.
For ANOVA table
the F - statistics is:
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...
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