題組內容

2.2. (10%) The heating bills for a random sample of houses in a city using three forms of heating (i.e., Natural Gas, Central Electric, and Heat Pump) with five bills for each of the 3 heating forms are obtained. Part of an ANOVA table is shown below.

(b) At \( a = .05 \), test to see if there is a significant difference among the average heating bills of all homes in the city using 3 forms of heating. (State the null and alternative hypotheses, compute the test statistic, and make your conclusion).