Lightwave Logic Inc (LWLG)

[spartex]

Y¯-d≤µ≤Y¯+d,

and if the standard deviation is known,

d=sN--vz1-0.025.

The critical value from the normal distribution for 1 - a /2 = 0.975 is 1.96. Therefore,
N≥(1.96d)2s2.

Limitation and interpretation A restriction is that the standard deviation must be known. Lacking an exact value for the standard deviation requires some accommodation, perhaps the best estimate available