national multiple family submetering and allocation billing program ...

characteristics of the property pairs were examined to determine the extent to which important
differences persisted. None of these characteristics were statistically significant (tested using a
dependent t-test or chi-square), although the small sample size means the power to detect
differences was low, and thus only large differences would be detected.
Comparison of Water Use Between Matched Pair Properties
The average annual water consumption per unit for the submetered/in-rent matched pairs
is shown in Table 5.22, while Table 5.23 displays the average annual water use per unit for the
RUBS/in-rent matched pairs. All of the averages are shown in Figure 5.16 and the differences
are shown in Figure 5.17.
Table 5.22 Average water use (kgal/unit/year), submetered/in-rent pairs
Mean
Std.
Deviation Minimum Maximum N
In-Rent 57.59 22.22 25.89 98.13 21
Submetered 47.61 14.55 22.45 78.96 21
Table 5.23 Average water use (kgal/unit/year), RUBS/in-rent pairs
Mean
Std.
Deviation Minimum Maximum N
In-Rent 66.19 22.80 33.63 98.31 14
RUBS 47.80 17.85 21.38 80.87 14
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