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发帖数: 817 | 1 0 At a small metal fabrication company, steel rods of a particular type cut
to
length have lengths with standard deviation 0.005 in. In an effort to
determine
the mean length produced using the current setup of the jig, a sample of
rods
is to be taken and their lengths measured, with the intention of using the
value of X-bar as an estimate of μ. Approximate the probabilities that X-
bar is
within .0005 in. of μ for samples of size n = 50, 100 and 400.
n P
50 _
100 _
400 _
Do your c | w****n
发帖数: 817 | | p********a
发帖数: 5352 | |
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