Answer: a) Required minimum sample size= 219
b) Required minimum sample size= 271
Step-by-step explanation:
As per given , we have
Margin of error : E= 5% =0.05
Critical z-value for 90% confidence interval : 
a) Prior estimate of true proportion: p=28%=0.28
Formula to find the sample size :-

Required minimum sample size= 219
b) If no estimate of true proportion is given , then we assume p= 0.5
Formula to find the sample size :-

Required minimum sample size= 271
Answer:
The answer would be 2012 and 2004
Step-by-step explanation:
when you round 30.346 to the nearest tenth it is 30.4 and when you round 30.406 to the nearest tenth then it is also 30.4.
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Answer:
Step-by-step explanation:
I think it is D but I am not sure