Answer:
99%
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 .
The margin of error is:
Sample proportion and same sample size, so what will determine the margin of error is z.
90% confidence level
So , z is the value of Z that has a pvalue of , so .
95% confidence level
So , z is the value of Z that has a pvalue of , so .
99% confidence level
So , z is the value of Z that has a pvalue of , so .
The 99% confidence interval has the largest margin of error.