Question
Two lines of regression are 3x+4y-7=0 and 4x+y-5=0 Then correlation coefficient between x and y is
The correct answer is:
Here, regression lines are 
and 
Hence, 
.
Related Questions to study
If the variance of x=9 and regression equations are 4x-5y+33=0 and 20x-9y-10=0, then the coefficient of correlation between x and y and the variance of y respectively are
If the variance of x=9 and regression equations are 4x-5y+33=0 and 20x-9y-10=0, then the coefficient of correlation between x and y and the variance of y respectively are
From a random sample space, 5 students has been selected. Their marks in Maths and Statistics as given below
The rank correlation coefficient is
From a random sample space, 5 students has been selected. Their marks in Maths and Statistics as given below
The rank correlation coefficient is
Two balloons A and B are taken at 300 K, maximum capacity of balloon A and balloon B are 800 ml and 1800 ml respectively. When the balloon system is heated, which one will burst first ? A B 1600 ML 700ML
Two balloons A and B are taken at 300 K, maximum capacity of balloon A and balloon B are 800 ml and 1800 ml respectively. When the balloon system is heated, which one will burst first ? A B 1600 ML 700ML
terms of H.P. for k N 
,then
terms of H.P. for k N ,then
A particular emission line, detected in the light from a galaxy, has a wavelength 
, where 
is the proper wavelength of the line. The galaxy distance from us
A particular emission line, detected in the light from a galaxy, has a wavelength , where is the proper wavelength of the line. The galaxy distance from us
Each side of triangle ABC is divided into three equal parts as shown in the figure ratio of area of hexagon PQRSTU to area of triangle ABC is
Each side of triangle ABC is divided into three equal parts as shown in the figure ratio of area of hexagon PQRSTU to area of triangle ABC is
Given the family of lines, 
Among the lines of the family, the number of lines situated at a distance of 
from the point M 
is
Given the family of lines, Among the lines of the family, the number of lines situated at a distance of from the point M is
If x1 and x2 are the solution of the equation 
-
If x1 and x2 are the solution of the equation -
The solution set of the system of equations,
is
In this question, we use logarithmic property to solve the equation. Remember. Here solve both equation and find the relation between x and y and then put any variable value in one relation and find one variable.
The solution set of the system of equations, is
In this question, we use logarithmic property to solve the equation. Remember. Here solve both equation and find the relation between x and y and then put any variable value in one relation and find one variable.
If x & y are real numbers and 
then ' y ' cannot take the value(s) :
In this question, we have to which value y cannot give. Here ‘y’ is always non-negative, so it never given the negative value.
If x & y are real numbers and then ' y ' cannot take the value(s) :
In this question, we have to which value y cannot give. Here ‘y’ is always non-negative, so it never given the negative value.
Statement 1:In the process of drying dishes with a towel, the wetting agent is the dish and the drying agent is the towel
Statement 2:The wetting agent gets wet during the process
Statement 1:In the process of drying dishes with a towel, the wetting agent is the dish and the drying agent is the towel
Statement 2:The wetting agent gets wet during the process
Which of the following are correct ?
In this question, we have to find which option is correct. Check every option which one is satisfy. Use the properties of the logarithmic which going to help to get the answer.
Which of the following are correct ?
In this question, we have to find which option is correct. Check every option which one is satisfy. Use the properties of the logarithmic which going to help to get the answer.
Statement 1:The reaction between 
and 
occurs in an acidic medium 
Statement 2: is reduced to 
in acidic medium
Statement 1:The reaction between and occurs in an acidic medium
Statement 2: is reduced to in acidic medium
Number of cyphers after decimal before a significant figure comes in 
is
In this question, we have to find the number of cyphers. We need to remember that the cypher number can be found from the logarithmic calculation but to find the actual value or to visualize it we need to remove the logarithm. Here, log105 = 0.6990 and log103 = 0.4770.
Number of cyphers after decimal before a significant figure comes in is
In this question, we have to find the number of cyphers. We need to remember that the cypher number can be found from the logarithmic calculation but to find the actual value or to visualize it we need to remove the logarithm. Here, log105 = 0.6990 and log103 = 0.4770.
The value of p for which both the roots of the quadratic equation, 
are less than 2 lies in :
In this question, we have to find where the p lies. Here, we use discriminant, which is 
. if D > 0 and D = 0 then real solution but if D < 0 then imaginary solution. Here we also us Factorization of quadratic equations.
The value of p for which both the roots of the quadratic equation, are less than 2 lies in :
In this question, we have to find where the p lies. Here, we use discriminant, which is . if D > 0 and D = 0 then real solution but if D < 0 then imaginary solution. Here we also us Factorization of quadratic equations.
