Page 1 - Home assignment-correlation analysis.

HOME ASSIGNMENT

Xi-Economics (030)

Statistics for Economics

Correlation analysis

Question (Very short answer type questions-1 mark) Marks
No
1. If the relationship between x and y is positive, as 1
variable y decreases, variable x:
a. Increases.
b. Decreases.
c. Remains same.
d. Changes linearly.
2. The value of coefficient of correlation always varies in 1
between:
a. 0 to 1 including both the limits.
b. 0 to -1 including both the limits.
c. -1 to 1 including both the limits.

d. None of these.
3. Scatter diagram helps us to: 1
a. find the nature of correlation between two
variables.
b. Obtain the mathematical relationship between
two variables.
c. Compute the relationship between two variables.
d. All of these.
4. Correlation coefficient is________ of the units of 1
measurement. (Independent/dependent)
5. When r = 1, all the points in a scatter diagram would lie: 1
a. On a straight line directed from lower left to
upper right.
b. On a straight line parallel to horizontal axis.
c. On a straight line parallel to vertical axis.
d. On a straight line directed from upper left to
lower right.
6. Whether the following statement is true or False. 1
“if precisely measured data are available, the simple
coefficient of correlation is more accurate than rank
correlation of coefficient”