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Short Questions: What will be `r_(xy)` if the two regression lines are coincident.

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Find out the correct answer out of the options given against each questions : If the two regression lines are mutually perpendicular to each other, then r is equal to

Write down the correct option: If two regression lines coincides r_(xy) is -

State True/False : The two regression equations coincide when r = +- 1 .

Answer the following questions in short: Following are two regression lines : 3x - 5y= 1 and 4x - 7y = 3 Find barx , bary and correlation coefficient r.

Answer the following questions in short: Following are two regression lines : 3x - 5y= 1 and 4x - 7y = 3 Identify which one is regression equation of x on y and which one is of y on x.

Answer the following questions (Alternatives are to be noted): If two lines of regression are given by 2x + 3y = 13 and 3x + 4y = 18, find the sum of A. M. s of x and y.

Short Questions: Calculate the means of the variables x and y, given the regression lines as x + 6y=8 and 3x + 2y = 10 .

Answer the following questions (Alternatives are to be noted) : What are regression coefficients?

Choose the correct alternative : [MCQ] The numerical value of the AM of two regression coefficients---

Fill up : The point of intersection of two regression lines give the___.

UNITED BOOK HOUSE-MODEL QUESTION PAPERS SET-07-Exercise
  1. Fill up : If b(xy) =-0.09 and b(yx) = -0.4 then r(xy) = .

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  2. Fill up : The point of intersection of two regression lines give the.

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  3. Fill up : An over all rise or fall in a time series is called the.

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  4. Fill up : In a trend equation y = a + bx, a is the and b represents t...

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  5. Fill up : A polynomial of the form y = a + bx + cx^2 is called a .

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  6. Fill up : In a symmetrical binomial distribution, p = .

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  7. Fill up : In a normal distribution, the value of 3rd order central mom...

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  8. State True/False : The variance of binomial distribution can never exc...

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  9. State True/False : For nornial distribution, the co-efficient of skewn...

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  10. State True/False : The parameter p and n completely determine a binomi...

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  11. State True/False : The correlation co-efficient x and y is 0.5, then b...

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  12. State True/False : The two regression equations coincide when r = +- 1...

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  13. State True/False : If Cov (x, y) = 0, then x and y are independent.

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  14. Short Questions: What will be r(xy) if the two regression lines are co...

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  15. Short Questions: Calculate the means of the variables x and y, given t...

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  16. Short Questions: Short notes: (i) Secular trend (ii) method of moving ...

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  17. Short Questions: The p.m.t. of a r.v.x. is given by f( x) = K.x^2, x= ...

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  18. Short Questions: For a poisson distribution, P[x = K] = P[x=K+1], Find...

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  19. Textual Questions: Explain different components of a time series.

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