for verifying suitability of equipment before using to analyse an sample,

we measure the response of sample for 6 times ( n=6), and verify the %RSD.

1) This query is about

2) Following is one such reference...

%RSD = KBsq( n) /t(90%,n−1)

B = specification window ( upper - target)

n = sample size

t = Student’s t at the 90% probability level (double sided) with n−1 degrees of freedom.

3.

we measure the response of sample for 6 times ( n=6), and verify the %RSD.

1) This query is about

**how to determine statistical criteria for maximum %RSD (relative standard deviation) for a given sample size**;2) Following is one such reference...

%RSD = KBsq( n) /t(90%,n−1)

B = specification window ( upper - target)

n = sample size

t = Student’s t at the 90% probability level (double sided) with n−1 degrees of freedom.

**i couldn't interpret / infer "k"**3.

**can i use the Minitab option for stat >****acceptance sampling by variables****; and even here any guidance on setting the variables of AOQL, k value,**

Last edited: