CAIIB ABM Unit 14 Correlation and Regression

1) What is a scatter diagram  ?
a)  diagram which scatters all elements of the variable.
b)  A graphic representation of the relationship of the variables
c)  Helps plot observed  values
d)  b& c


2)  In what range does  correlation coefficient lie ?
a.  0 to +1
b.  -1 to 0
c.  -1 to +1
d.  > 1
Ans-c

SELVARAJ T:
Scatter digram?
Ans-Visual representation of dat

Meenakshi:
when more than two variables come in play that is called ....??

SELVARAJ T:
Multiple correlation

Priyadarshini:
Multiple Correlation

Meenakshi:
in an inverse relationship,if one variable increases other....???

Priyadarshini:
Decrease

Meenakshi:
linear relationship??

Roselin:
Draw a line to fit the data

SELVARAJ T:
Curvilinear relationship?

Meenakshi:
when we cant draw lines but a curve

Lalu Poddar:
Cannot draw a line to fit the data but draw a curve.

Meenakshi:
value of r =-1indicates

Lalu Poddar:
Perfect Inverse relationship

SELVARAJ T:
r=1?

Meenakshi:
r=+1 indicates??

Lalu Poddar:
Perfect direct relationship

Meenakshi:
perfect direct relationship

SELVARAJ T:
r=0?

Roselin:
No linear relationship

SELVARAJ T:
But curvilinear relationship may Exist

Meenakshi:
square of r is ???

SELVARAJ T:
Correlation of determination

mcmillan solution Q

Happy Reading :)