The breaking strength of cable is known to be normally distributtes with a mean of 4000 kg and a standard deviation of 25 kg.The manufacturer prefers that at least 95% of his product meet a strength requirement og 4050 kg.is that requirement being met?if not. by changing the process parameter,what should be the process mean target value be?

Question

drwls · Answer

Using http://psych.colorado.edu/~mcclella/java/normal/accurateNormal.html ,
I find that only 2.3% of the cables will have a breaking strength of 4050 kg (force)

Assuming that the standard deviation remains the same, there should be a new target value of 4091 kg. Then, only 5% will have breaking strength below 4050

Novya · Answer

Can you please explain how did you come to this conclusion? I have gone to the site mentioned there but still am unable to understand more clearly.