Answer:
The margin of error is of 0.038 = 3.8%.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
For this problem, we have that:
90% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The margin of error is:
The margin of error is of 0.038 = 3.8%.
The answer could be 48/5 or 9 and 3/5 or 9.6 These all mean the same exact thing. You get the answer by multiplying 12/1 and 4/5 to get 48/5.
Given:
To solve, we need to get n isolated on one side. To do this, subtract 10 from both sides. This will cancel the +10 on the right side and give us -12 of the left, leaving us with:
or 
If you want to check your answer, plug in -12 for n.
The statement is true, therefore, 
.
Answer:
2nd option : 4.625
Step-by-step explanation:
We can convert this to decimal:
0.625×740=4.625
N = 1/4 I hope this helps
