Question
Which of the following is correct regarding
regression coefficient?Solution
The regression coefficients are independent of the change of origin, but not of the scale. By origin, we mean that there will be no effect on the regression coefficients if any constant is subtracted from the value of X and Y. By scale, we mean that if the value of X and Y is either multiplied or divided by some constant, then the regression coefficients will also change.
The average speed of a bus is 6/7 of the average speed of a car which covers 3500 km in 60 hrs. What is the average speed of the bus?
Arijit, Benny, and Chetna together can complete a work in 12 days. If the ratio of the efficiency of Arijit, Benny, and Chetna is 8:5:6, respectively, t...
- Find the distance covered (in km) by Rina in 5 hours if her speed is 20 m/s.
How far will 'Neha' travel by the time she catches up to 'Simran', given that 'Neha' starts 75 km behind and moves at 60 km/h while 'Simran' moves at 45...
- Two ships ‘M’ and ‘N’, which were 1020 km apart, started traveling towards each other at the same time and met after 6 hours. If the speed of ship ...
- Nisha travels the first half of her journey at a speed of 80 km/hr and the second half at the speed of ‘x’ km/hr. If her average speed for the entire t...
The speed of a train is 108 km/hr and it takes 14 seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of...
A car completes a journey in 6 hrs with a speed of 50 km/hr. At what speed must it travel to complete the journey in 5 hrs?
'A’ and ‘B’ started moving towards each other at same time with a speed of 8 km/hr and 10 km/hr, respectively. If the distance covered by ‘A’ ...
Two vehicles, named as 'X' and 'Y', travel along side-by-side paths but in opposite directions. The length of vehicle 'Y' surpasses that of 'X' by 12.5%...
