1Dieselpowered trucks are a target for conversion to natural

1-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.

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

3-Explain how this rapid prototyper works: http://www.ted.com/talks/joe_desimone_what_if_3d_printing_was_25x_faster?language=en

Solution

Please post the first question in \"Operations Management\" domain.

Here is the answer to the second question:

For normal distribution curve, we need to determine what percentage falls outside of +-2 standard deviations. Basically, we need to determine what percentage lies outside -2<z<2

We can check this from normal distribution table. The porbability of such events will be equal to 2P(z<-2) = 2*0.02275 = 0.0455

Therefore, 4.55% lies outside +-2 standard deviations in normal distribution.

For +-1 standard deviation, we find the probability 2*P(z<-1) = 2*0.15866 = 0.31732

Therefore, 32.73% lies outside +-1 standard deviation in normal distribution.