The Heating Bills for a Selected Sample of Houses Using

Essay

The heating bills for a selected sample of houses using various forms of heating are given below (values are in dollars). $$\begin{array} { c c c } \text { Gas-Heated Homes } & \text { Central Electric } & \text { Heat Pump } \\83 & 90 & 81 \\80 & 88 & 83 \\82 & 87 & 80 \\83 & 82 & 82 \\82 & 83 & 79\end{array}$$ At α = .05, test to see if there is a significant difference among the average bills of the homes.