All other columns(j) All other rows (i) N1 = Total(j) N1 = Total(i) N2 = N - N
| All other columns (j) | All other rows (i) |
| N1=Total(j) | N1=Total(i) |
| N2=N-N1 | |
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If the standard deviation is known, we will use a normal law 
where f is a calculated estimator
for
If the standard deviation is unknown, we will use a normal law 
for
