You have been asked to analyze heating costs and recommend the cheapest heating system. The heating bills from randomly selecting homes using various forms of heating systems are given below.(Values are in dollars.)

Natural Gas

Central Electric

Heat Pump

84

96

87

64

65

93

90

91

89

62

96

92

71

90

85

a.

Construct an analysis of variance table, with = 0.10, to test whether the different heating systems influences the bills received by customers.