The heating bills for a selected sample of houses in a city using various forms of heating are given below (values are in dollars). 
At α = .05, test to see if there is a significant difference among the average bills of all the homes (in a city) using three forms of heating. Use both the critical and p-value approaches.
Definitions:
Expert Systems
A type of artificial intelligence program that uses knowledge and inferential rules to solve problems that would require human expertise.
Natural Language Processing
A branch of artificial intelligence that deals with the interaction between computers and humans using natural language.
Primary Key
A unique identifier for each record in a database table, which ensures that each entry is distinct from all others.
OLAP
Stands for Online Analytical Processing, a category of software tools that provide analysis of data stored in a database.
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