The sample size should be n ≤ 30
The standard deviation of a set indicates how accurate and near the set's measurements are.
The precision increases as the standard deviation decreases.
Given:
N=600
for infinite standard deviation (σ) = 1
corelation factor (f) = n/N
f ≤ 0.05
n/N ≤ 0.05
n ≤ 0.05*600
n ≤ 30
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