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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

Statistics and Probability, Statistics

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