Recent content by jingjang

or is it like this t=(3.2ppm-3ppm)/0.48ppm * √n =2.97 H(S=95%,n-1) x=μ--> t=2.0092 2.97<2.0092 (not true) H(S=99%, n-1) x≠μ t=2.6802 2.97>2.6802 (true)

n=50 x=3ppm xi=3.2ppm s2=0.23ppm2 s=0.48ppm λ=(3.2ppm-3ppm)/0.48ppm=0.42 hmmm...

Hello i have a problem with my homework and i hope someone can help me? because i really don't know how to calculate this so its translated with google translate :blushing: Major customer PCB (polychlorinated biphenyls, a hazardous substance used in manufacture of transformers and...