Tag: simple moving average
Questions Related to simple moving average
Consider the following statements: (1) If the correlation coefficient ${ r } _{ xy }=0$, then the two lines of regression are parallel to each other (2) If the correlation coefficient ${ r } _{ xy }=+1$, then the two lines of regression are perpendicular to each other? Which of the above statements is/are correct?
Find the Value of $y$ from the following data when $x=70$ and coefficient of correlation $0.8$.
Series | $x$ | $y$ |
---|---|---|
A.M | $18$ | $100$ |
Standard Deviation | $14$ | $20$ |
Find the equation of $x$ on $y$ on the basis of the following data:
$x$ | $2$ | $4$ | $6$ | $8$ | $10$ |
---|---|---|---|---|---|
$y$ | $6$ | $5$ | $4$ | $3$ | $2$ |
If $4\bar {x}-5\bar y+33=0$ and $20\bar x-9\bar y=107$ are two lines of regression, then what are the values of $\bar { x } $ and $\bar { y } $ respectively.
For the variables $x$ and $y$, the regression equations are given as $7x-3y-18=0$ and $4x-y-11=0$. Identify the regression equation of $y$ on $x$.
What would be the estimated sale on the advertisement expenditure of Rs $15$ lakhs,on the basis of following data obtained from the company?.The coefficient of correlation is $0.8$.
Advertising expenditure(in Rs.lakhs) $x$ | Sale (in Rs lakhs) $y$ | |
---|---|---|
Mean | $20$ | $90$ |
standard Deviation | $5$ | $12$ |
Find the equation of $y$ on $x$ for the following data
$x$ | $8$ | $6$ | $4$ | $7$ | $5$ |
---|---|---|---|---|---|
$y$ | $9$ | $8$ | $5$ | $6$ | $2$ |
For the variables $x$ and $y$, the regression equations are given as $7x-3y-18=0$ and $4x-y-11=0$. Find the arithmetic means of $x$ and $y$ respectively.
The two lines of regression are $x+2y-5=0$ and $x+3y-8=0$. The coefficient of correlation between $x$ and $y$ is
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