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If the lines of regression are x – y = 0 and 4x – y – 3 = 0 and _x² = 1, then the coefficient of correlation is

1) – 0.5 2) 0.5 3) 1.0 4) – 1.0 Solution: (2) 0.5 y = x and x = (1... View Article

1) Parallel to axes 2) Perpendicular to axes 3) Inclined at any angle with axes 4) Coincident Solution: (1) Parallel... View Article

1) Zero 2) One 3) Negative 4) Positive Solution: (3) Negative If the correlation coefficient is negative, then the regression... View Article

1) 2 2) 5 3) 8 4) None of these Solution: (2) 5 s = a + (y / m),... View Article

1) 0 and 1 2) –1 and 1 3) 0 and ∞ 4) –∞ and 0 Solution: (2) –1 and... View Article

1) 0 2) –1 3) 1 4) 0.5 Solution: (2) –1 Coefficient of correlation = 1 – [6 ∑di2 /... View Article

1) The value of y increases 2) The value of y decreases 3) The value of y remains constant 4)... View Article

1) 1 2) –1 3) 1 / 2 4) 0 Solution: (4) 0 Both X and Y are independent variable,... View Article

1) 63 / √94 * 66 2) 63 3) 63 / √94 4) 63 / √66 Solution: (1) 63 /... View Article

1) 0.49 2) 0.40 3) – 0.49 4) – 0.40 Solution: (1) 0.49 Here x {bar} = 4, y {bar}... View Article

1) 0.90 2) 0.96 3) – 0.90 4) – 0.96 Solution: (2) 0.96 Here ∑x = 44, ∑y = 64... View Article

1) gm 2) cm 3) gm. cm 4) None of these Solution: (4) None of these Correlation is always unitless.

1) –r 2) 1/r 3) r 4) 1– r Solution: (3) r If the correlation between x and y is... View Article

1) Correlation is negative and curved 2) Correlation is linear and negative 3) Correlation is in the third and fourth... View Article

1) Perfect 2) Negative 3) Very low 4) Very high Solution: (3) Very low If r = 0.2, then the... View Article

1) y = – x 2) y = x 3) y = 2x 4) y = – 2x Solution: (2)... View Article

1) r = 1 2) r = –1 3) r = 0 4) r = ± 1 / 2 Solution:... View Article

1) 0 – 10 6 10 – 20 11 20 – 30 14 30 – 40 3 2) 0 –... View Article

1) 2 / 3 2) 8 / 3 √2 3) 9 / 8 √2 4) 2 / 9 Solution: (1)... View Article

1) 1 2) 0 3) –1 4) None of these Solution: (3) –1 xi + yi = n + 1... View Article