Aspire's Library

A Place for Latest Exam wise Questions, Videos, Previous Year Papers,
Study Stuff for MCA Examinations
  • AMU MCA
    Previous Year Questions

AMU MCA Previous Year Questions (PYQs)

AMU MCA Correlation And Regression PYQ

AMU MCA PYQ
Coefficient of correlation is equal to





Go to Discussion
AMU MCA Previous Year PYQ AMU MCA AMU MCA 2020 PYQ

Solution

Correlation coefficient $r=\pm\sqrt{b_{xy}b_{yx}}$

Hence it is geometric mean of two regression coefficients.

AMU MCA PYQ
The relationship between the standardized and non-standardized regression coefficients is:






Go to Discussion
AMU MCA Previous Year PYQ AMU MCA AMU MCA 2020 PYQ

Solution

Solution:

Standardized regression coefficient:

$\beta = b \left(\frac{S_x}{S_y}\right)$

AMU MCA PYQ
Given regression equations: $8X-10Y+66=0$ $40X-18Y=214$ Find correlation coefficient $r$.





Go to Discussion
AMU MCA Previous Year PYQ AMU MCA AMU MCA 2021 PYQ

Solution

Slope from first equation: $Y=\frac{8}{10}X+\text{const}$ Slope from second: $X=\frac{18}{40}Y+\text{const}$ Product of regression coefficients: $r^2=\frac{8}{10}\cdot\frac{18}{40}$ $=\frac{144}{400}=0.36$ $r=0.6$

AMU MCA

Online Test Series,
Information About Examination,
Syllabus, Notification
and More.

Click Here to
View More

AMU MCA

Online Test Series,
Information About Examination,
Syllabus, Notification
and More.

Click Here to
View More
Ask Your Question or Put Your Review.

loading...