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Table 3 Paired t-test analysis

From: Impact of COVID-19 on energy consumption in a residential complex in Hyderabad, India

Parameters

AC energy 2019

AC energy 2020

Operating hour 2019

Operating hour 2020

Household electricity 2019

Household electricity 2020

Mean

40.47

42.10

20.92

22.09

12.31

14.05

Variance

720.26

769.78

90.76

121.72

28.20

34.46

Number of observations

2242.00

2242.00

2242.00

2242.00

2242.00

2242.00

Degree of freedom

2241.00

 

2241.00

 

2241.00

 

t-stat

− 3.04

 

− 5.31

 

− 20.81

 

P (T ≤ t) two tail

0.002

 

12.4E-8

 

4.66E-88

 

t-critical two tail

1.961

 

1.961

 

1.961