Dieselpowered trucks are a target for conversion to natural

Diesel-powered trucks are a target for conversion to natural gas. Dig deeper into this subject to find out what has happened to bring this about.

including how the distribution infrastructure might work for natural gas vehicles.

What % falls outside of +/-2 standard deviations for a Gaussian (normal) curve? Outside +/-1?

Falls outside of +/-2 is 95.4

Explanation:

usually bell shaped curve 2 having 27.2 % from +/- 1. It covering middle to before the ending part

Outside +/-1 is 68.2 Percentage

Explanation

Bell shaped curve having mostly shaped in between 0 to +/- 1. It covers starting to middle part