Let the speed of the boat = 9km/hr Speed of current = x km/hr Speed upstream = (9 – x) km/hr Speed downstream = (9 + x) km/hr Time upstream + time downstream = 3 hours Time = distance/(speed ) 12/(9-x)+ 12/(9+x) = 3 x = 3 km/hr
X and Y are independent normal variables with mean 50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution o...
To estimate the average work experience of MBA students at a management institute, five students are selected at random from each type of background, s...
If rp be partial correlation compound on sample rAB.c compound from sample of size n, the test statistic for significance testing is
For the following frequency distribution
Class : 3-5 5-7 7-9 ...
With reference to analysis of variance. which of the following statements is/are correct?
(I) Change of origin will affect the value of F
...Which of the following statements is INCORRECT?
Following two statements are related to regression coefficient
(I) Independent of the change of origin
(II) Independent of the change of scale
If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:
For the ANOVA table
the F - statistics is
