The Heating Bills for a Selected Sample of Houses Using $\alpha$

Essay

The heating bills for a selected sample of houses using various forms of heating are given below.(Values are in dollars. )

a.At $\alpha$ = 0.05,test to see if there is a significant difference among the average heating bills of the homes.Use the p-value approach.
b.Test the above hypotheses using the critical value approach.Let $\alpha$ = .05.