Environmental Engineering Reference
In-Depth Information
Table 4 Variables and descriptive statistics of the sample
Variable
Mean
Sd
Min
Max
Natural gas consumption
4801.535
3464.492
141
20648
Natural gas price
0.054
0.007
0.029
0.130
Electricity consumption
2810.529
1654.557
29
21079
Electricity price
0.147
0.007
0.107
0.175
Number of members
2.722
1.180
1
7
Number of persons in work
1.283
0.870
0
5
Household head retired
0.213
0.410
0
1
Household head female
0.366
0.482
0
1
Household head w/primary education
0.321
0.467
0
1
Household head w/secondary education
0.380
0.486
0
1
Household head w/higher education
0.299
0.458
0
1
Income <
€
1,500/month
0.449
0.498
0
1
Income
€
1,500
2,500/month
-
0.380
0.486
0
1
Income >
€
2,500/month
0.171
0.377
0
1
Surface area of dwelling
86.477
34.433
25
500
Number of rooms
4.591
1.455
1
12
Rented dwelling
0.177
0.382
0
1
Home with electric oven
0.789
0.408
0
1
Number of TV sets
2.027
0.963
0
6
Home with tumble dryer
0.148
0.355
0
1
Home with dishwasher
0.507
0.500
0
1
Rated electrical power
3.899
1.049
1.1
10.4
2-monthly electricity bill
0.541
0.499
0
1
Dwelling in northern area
0.262
0.440
0
1
Note
The statistics for
are calculated on the
basis of the number of homes that use natural gas, i.e. 327 observations. The sample for all the
remaining variables contains 820 observations. The variables
“
natural gas (full)
”
and
“
electricity
(full)
”
represent those households which have heating and domestic hot water systems
red by
natural gas and electricity, respectively. Energy consumption is measured in kWh, and prices
correspond to the variable unit costs measured in Euros/kWh. CO
2
emissions are measured in kg
CO
2
/m
2
per annum. Surface area is measured in m
2
Source
Own work
“
natural gas consumption
”
and
“
natural gas price
”
have average education and 29.9 % have a university or higher education quali
-
cation. Around 45 % of the households in the sample have monthly incomes of less
than
1,500.
In the sample, 17.8% of households use electricity for heating and hot water, while
327 households use natural gas, of which 77.4 % (30.9 % of the total sample) use gas
for both heating and hot water. On average, each household in the sample has two TV
€
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