Question
Metal components for a machine have lengths which are normally distributed with mean 8 cm and standard deviation 4 cm.
A) the longest 10% of components require filling down. What is the smallest length of component which require filing down?
B) the shortest 15% of components have to be discarded. What is the smallest length of component which would not be discarded?
Please help
Thankyou
A) the longest 10% of components require filling down. What is the smallest length of component which require filing down?
B) the shortest 15% of components have to be discarded. What is the smallest length of component which would not be discarded?
Please help
Thankyou
Answers
you can answer these and many other Z table things at
http://davidmlane.com/hyperstat/z_table.html
http://davidmlane.com/hyperstat/z_table.html
3(a)X=Z×sd
X=85+(1.2816)x4
X=90.1264
X=85+(1.2816)x4
X=90.1264
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