1. Find out the the unit of measurement of variance for the following data?
|
$110
|
$200
|
$190
|
$175
|
|
$120
|
$120
|
$190
|
$100
|
|
$180
|
$100
|
$170
|
$145
|
|
$95
|
$185
|
$100
|
$210
|
|
$135
|
$195
|
$240
|
$120
|
a. Dollars
b. Dollars squared
c. The variance doesn't have a unit of measurement.
d. Cannot say
2. The covariance between X and Y is 10. The standard deviation of X is 2. The standard deviation of Y is 5. Find out the correlation coefficient between X and Y?
a. 25
b. 0.25
c. 1
d. 0