Formula Used:

For infinite population:

n = (Z²p(1-p))/e²

For finite population:

n = (Z²p(1-p))/e² ÷ (1 + (Z²p(1-p))/(e²N))

Where:

• n = Sample size
• Z = Z-score (from confidence level)
• p = Expected proportion
• e = Margin of error
• N = Population size