NDA2021MathematicsStatisticsActual
Two regression lines are given as 3 x-4 y+8=0 and 4 x-3 y-1=0 . Consider the following statements : 1. The coefficient of correlations r is 3 4 . 2. The means of x and y are 3 and 4 respectively. Which of the above statements is/are correct?
Options
- A1 only
- B2 only
- CBoth 1 and 2
- DNeither 1 nor 2
Correct answer
A. 1 only
Step-by-step solution
co-efficient of correlations. aligned & |r|= b y x b x y = 3 4 3 4 = 3 4 & r= 3 4 aligned Since b y x and b x y are positive r= 3 4 This means x and y have positive relationship (increasing).