Table 5 Beta distribution parameters
Combustible | Mean annual inflation rate (5-year span) (%) | Standard deviation (5-year span) (%) | α | β | Lower limit (\(\overline{x} - 3\sigma\)) (%) | Upper limit (\(\overline{x} + 3\sigma\)) (%) |
|---|---|---|---|---|---|---|
Diesel | 3.43 | 0.23 | 2.22 | 2.72 | − 3.84 | 5.39 |
Bulk pellets | 2.20 | 0.92 | 0.64 | 1.09 | − 3.73 | 7.83 |
Wood chip | 0.22 | 1.10 | 2.52 | 1.33 | − 11.05 | 5.90 |
Olive kernel | 4.58 | 2.49 | 0.49 | 0.93 | − 6.93 | 16.64 |
Milled nutshell | 5.01 | 1.97 | 3.73 | 3.30 | − 13.47 | 14.31 |