The heating bills for a selected sample of houses in a city using various forms of heating are given below (values are in dollars).
Gas Heated Homes
Central Electric
Heat Pump
83
90
81
80
88
83
82
87
80
83
82
82
82
83
79
?
At ? = .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.
What will be an ideal response?
| ANOVA | ||||||
| Source of Variation | SS | df | MS | F | p-value | F critical |
| Between Groups | 70 | 2 | 35 | 6.77 | 0.0107 | 3.89 |
| Within Groups | 62 | 12 | 5.167 | |||
| Total | 132 | 14 |
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What will be an ideal response?
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