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Statistics Test...

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  • Question 1
    4 / -1

    The coefficients of correlation between the heights (in inches) of fathers and sons from the following data will be
    Heights of fathers (x) 65 66 67 68 69 70 71
    Heights of sons (y) 67 68 66 69 72 72 69

  • Question 2
    4 / -1

  • Question 3
    4 / -1

    For the following pairs of observations (1, 10), (2, 9), (3, 9), (4, 8), (5, 6), (6, 12), (7, 4), (8, 3), (9, 13), (10, 1), then Cov (x, y) =

  • Question 4
    4 / -1

  • Question 5
    4 / -1

    If the variances of two variables x and y are respectively 9 and 16 and their covariance is 8, then their coefficient of correlation is

  • Question 6
    4 / -1

  • Question 7
    4 / -1

    In a scatter diagram, the points are scattered equally in a corners of a quadrants, then

  • Question 8
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    The points of scatter diagram in perfect positive correlation are situated at the line

  • Question 9
    4 / -1

    If r = 0.2, then linear correlation will be necessarily

  • Question 10
    4 / -1

    If r = – 0.97, then

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