Table of Contents
Statistics
Control Charts
Normal Distributions
Sampling of potato chips
Weigh the sample
Disolve the sample
Determine the salt content
The results are recorded
In this case three samples are taken
The distribution is place on a chart
One standard deviation from set point salt (1.6%)
Three standard deviations from 1.6% set point
3 standard distribution is the control limit
One s is 0.28% for 1 sample One s is 0.16% for 3 sample
Control limit is 1.6+3*0.16=2.08 Control limit is 1.6-3*0.16=1.12
Sample Results
This will occur only 0.3% times
Standard deviation/(n)1/2
Standard deviation/(n)1/2
s is reduced by 81/2 or 2.8
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Author: Compaq User
Email: Grow@adm.njit.edu
Home Page: http://www-ec.njit.edu/~grow/statisti.htm
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