Petroleum & Other Liquids
Gasoline and Diesel Fuel Update
Gasoline Release Date: October 9, 2012 | Next Release Date: October 15, 2012
Diesel Fuel Release Date: October 9, 2012 | Next Release Date: October 15, 2012
Definition of the Coefficient of Variation
The Coefficient of Variation (CV) of the mean, a measurement of variability of the mean price, is calculated as the standard error divided by the mean. As a measure of precision reflecting the error due to sampling, it can also be used to construct a confidence interval for the population mean. For example, a mean price of $1.67 and a CV of 0.004 (.4%) indicates at the 95% confidence level that the population mean price has an upper limit of $1.68 ($1.67 + 1.96*0.004*$1.67) and a lower limit of $1.66 ($1.67 - 1.96*0.004*$1.67).
On-Highway Diesel Fuel Prices & Coefficients of Variation Report
Procedures & Methodology
Gasoline
Data collection procedures
Sampling methodology
Coefficient of variation
Map of reformulated gasoline
Map of states in each region
Diesel
Data collection procedures
Sampling methodology
Coefficient of variation
Map of states in each region
Gasoline and Diesel
Taxes
Pump methodology
Gasoline pump data history
Diesel fuel pump data history