Statistics for Business Quiz

Simple correlation is called ------- .

• Linear correlation

• Nonlinear correlation

• Both

• None

Whatever may be the value of r, positive or negative, its square will be

• Negative only

• Positive only

• Zero only

• None only

Scatter diagram helps us to

• Find the nature correlation between two variables

• Compute the extent of correlation between two variables

• Obtain the mathematical relationship between the two variables

• Both a and c

• Are perpendicular to each other

• Coincide

• Are parallel to each other

• None

Rank correlation was developed by

• Spearman

• Karl Pearson

• Laspeyre

• None

The correlation between the population of a country and the number of train accidents is

• Positive

• Negative

• Spurious

• None

The correlation is said to be positive

• When the values of two variables move in the same direction

• When the values of two variables move in the opposite direction

• When the values of two variables would not change

• None of these

The value of correlation coefficient(r) lies between

• -1 and +1

• -1 and 0

• 0 and 1

• None

Under the concurrent deviation method, if the value C=0 then the value of correlation coefficient is

• 0

• 1

• -1

• ∞

The co-efficient of correlation is not affected by

• Change of origin

• Change of scale

• Both Change of origin and scale

• None