Answer:
b
Step-by-step explanation:
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Answer: 601
Step-by-step explanation:
The formula to find the minimum sample size(n) , if the prior population proportion is unknown:
, where E = margin of error ,
= critical z-value for confidence level c.
Given : E = 0.04
Z-value for 95% confidence = 1.96
So, the minimum sample size required = 

Hence, the minimum sample size required = 601
Answer:
9/4 * 3/4 = 27/16 = 1 
Step-by-step explanation: