THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Consider the following (x,y)sample data:
(24,24),(19,33),(21,31),(10,36),(22,30),(13,36),(21,32),(23,26),(20,26),and
(21,31).
-Calculate the variances 
and 
and the covariance sxy.
Definitions:
SPSS
A comprehensive software package for statistical analysis, widely used in social science research for data management and documentation.
Gasoline
A petroleum-derived liquid mixture used primarily as fuel in internal combustion engines.
Forbes 500
An annual listing by Forbes magazine that ranks 500 of the largest United States corporations by total revenue.
Prediction Interval
An estimate of an interval in which future observations will fall, with a certain probability, given what has already been observed.
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