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11th Standard English Medium Business Maths Subject Correlation and Regression Analysis Creative 3 Mark Questions with Solution Part - I

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 3 = 15
  1. Calculate the covariance of the following pairs of observation of two variates X and Y. (1, 5)(2, 4)(3, 3)(4, 2)(5, 1)

  2. Explain the concept of correlation and co-efficient of correlation.

  3. Calulate the co-efficient of correlation between x and y on the basis of the following observations. \(\sum\)\(\sum\)x=10, \(\sum\)x2=250, \(\sum\)y=70, \(\sum\)y2=300, \(\sum\)xy=75 and n =20

  4. The co-efficient of correlation between two variables X and Y is 0.5 and their co-variance is 5.81. The variance of X is 12. Find the satandard deviation of the Y-series.

  5. prove that the correlation co-efficient is the geometric mean of regression co-efficients.

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