Sampling, Chapter 2
7. n = (ts/e)2
Assuming 10 samples, t = 2.228 at 95% CL
n = [(2.228 x 5) / 2]2 = 31
Recalculating with t for 30,
n = 26, another recalc with 26 gives 26 again.
n = 26, so 26 samples should suffice
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