## Answers

Solution :

Given that,

= 1 - = 0.5

margin of error = E = 0.04

Z/2 = 1.96

sample size = n = (Z / 2 / E )2 * * (1 - )

= (1.96 / 0.04)2 * 0.5 * 0.5

= 601

The minimum sample size required is **601**

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