Proportion-  represents a part of a whole. It can be expressed as a fraction, decimal, or percentage. 12%=0.12=12/100 or 3/25. Proportions can also represent probabilities.

Formula for a specific Confidence Interval for a Proportion

p(hat) - z sub alpha/2 * the square root of p(hat) * q(hat)/n  < p < p(hat) + z sub alpha/2 * the square root of p (hat) * q(hat)/n 








R.A.F. Tiron