Question

A coefficient of correlation of -0.9 indicates the relationship between the two variables is

(a) weak and negative

(b) strong and positive

(c) strong and negative

Answer 1

Answer : (c) Strong and negative.

A coefficient of correlation of -0.9 indicates the relationship between the two variables is strong and negative.

Note :

If r > 0, the correlation is positive and if r < 0, the correlation is negative.

If r =0 we say the variables are uncorrelated.

Larger the numerical value of r, moreci close is the extent of relationship between the variables.

In general for Irl > 0.8, we consider high correlation.

If Irl is between 0.3 to 0.8, we say that correlation is considerable.

If IrI< 0.3, we say that correlation is negligible.

If r =1, we say there is perfect positive correlation whereas

if r = -1, we say that there is perfect negative correlation.