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11th Standard English Medium Business Maths Subject Correlation and Regression Analysis Book Back 1 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 5
    6 x 1 = 6
  1. The variable which influences the values or is used for prediction is called________.

    (a)

    Dependent variable

    (b)

    Independent variable

    (c)

    Explained variable

    (d)

    Regressed

  2. The regression coefficient of Y on X ________.

    (a)

    bxy =\(\frac { N\Sigma dxdy-(\Sigma dx)(\Sigma dy) }{ N\Sigma dy^{ 2 }-(\Sigma dy)^{ 2 } } \)

    (b)

    byx =\(\frac { N\Sigma dxdy-(\Sigma dx)(\Sigma dy) }{ N\Sigma dy^{ 2 }-(\Sigma dy)^{ 2 } } \)

    (c)

    byx =\(\frac { N\Sigma dxdy-(\Sigma dx)(\Sigma dy) }{ N\Sigma dx^{ 2 }-(\Sigma dx)^{ 2 } } \)

    (d)

    bxy =\(\frac { N\Sigma xy-(\Sigma x)(\Sigma y) }{ \sqrt { N\Sigma { x }^{ 2 }-(\Sigma x)^{ 2 }\times \sqrt { N\Sigma { y }^{ 2 }-(\Sigma y)^{ 2 } } } } \)

  3. The lines of regression of X on Y estimates ________.

    (a)

    X for a given value of Y

    (b)

    Y for a given value of X

    (c)

    X from Y and Y from X

    (d)

    none of these

  4. If two variables moves in decreasing direction then the correlation is ________.

    (a)

    positive

    (b)

    negative

    (c)

    perfect negative

    (d)

    no correlation

  5. The term regression was introduced by ________.

    (a)

    R.A Fisher

    (b)

    Sir Francis Galton

    (c)

    Karl Pearson

    (d)

    Croxton and Cowden

  6. If Cov(x, y) = –16.5, \({ \sigma }_{ x }^{ 2 }=2.89,{ \sigma }_{ y }^{ 2 }\) = 100. Find correlation coefficient ________.

    (a)

    -0.12

    (b)

    0.001

    (c)

    -1

    (d)

    -0.97

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