Notes: The data in this table are for households that used natural gas.
The percentiles describe the distribution of household natural gas consumption data; for example, 25% of households consumed less than 43 thousand cubic feet and 75% consumed more than that amount.
Source: 1997 Residential Energy Consumption Survey.

Table 2. Mean Annual Natural Gas Consumption, 1997
(thousand cubic feet per household)

	Natural Gas Consumption per Household (1,000 cf)	Relative Standard Error (percent)	Standard Error (1,000 cf)	95% confidence level lower bound (1,000 cf)	95% confidence level upper bound (1,000 cf)
All Households	83	1.8	1	80	86

Notes: The data in this table are for households that used natural gas.
The standard error is a measure of sampling error and can be used to calculate a confidence range. For example, the estimate for natural gas consumption for households is 83 thousand cubic feet (cf) and the standard error is 1 thousand cf. The 95% confidence interval is calculated by multiplying 1.96 times the standard error, and the 95% confidence range is 80 thousand cf to 86 thousand cf.
Source: 1997 Residential Energy Consumption Survey.

Return to: “Median Values and Percentiles for Household Energy Data”