E=Z*sqrt (p(1-p)/N), where E= error margin, p=proportion, N=sample size
Katrina's margin error at 85% confidence interval: E=1.96*sqrt (p(1-p)/100) = 0.196 sqrt (1(1-p))
Mathew's margin error at 99% confidence interval: E= 2.58*sqrt (p(1-p)/400) = 0.129 sqrt (p(1-p))
Since both obtained same estimate of proportion (that is, value of p), it can be seen that Mathew's estimate will have a small error (That is, 0.129 is smaller than 0.196). This can be attributed to larger sample size although a wider confidence (99%) interval was considered.
        
             
        
        
        
Answer:
2000 x 0.03 = 60
2000 + 60 = 2060
2060 x 0.03 = 61.8
2060 + 61.8 = 2121.8
Step-by-step explanation:
 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
 
        
             
        
        
        
Answer:
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Step-by-step explanation:
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