correlation Flashcards
1
Q
meaning of correlation
A
means association
2
Q
what are the types of correlation
A
postive
negative
zero
3
Q
correlation coefficient
A
indicates the extent to which the pairs of numbers for these two variables lie on a straight line
4
Q
correlation coefficient symbol
A
r
5
Q
coefficients range from
A
-1.0 to +1.0
6
Q
negative correlation coefficient is
A
less than zero
7
Q
positive correlation coefficient is
A
above zero
8
Q
what graphs are correlation plotted on
A
scattergrams
9
Q
scattergram includes
A
one co-variable on x axis and on y axis
line of best fit
10
Q
what is the gradient of the line the same as
A
correlation coefficient
11
Q
uses of correlation
A
prediction
validity
reliability
theory verification
