Find the margin of error for a survey that has the given sample size. Round the answer to the nearest tenth of a percent.
1. 225
2. 100
3. 625
4. 3600
5. 4200

How do i do this, please helpp.

Question

Find the margin of error for a survey that has the given sample size. Round the answer to the nearest tenth of a percent.
1. 225
2. 100
3. 625
4. 3600
5. 4200

How do i do this, please helpp.

rogue · Answer

According to this great video I found, you'd need more information to do this problem. In addition to the sample size, you need the confidence coefficient and standard deviation. http://www.youtube.com/watch?v=Mfia4nbh-zU

anonymous · Answer

it will be 2nd one

anonymous · Answer

My professor did some of these problems today & this was all the information he had & he solved it.

rogue · Answer

Hmm, then assume standard deviation and confidence level to be 1? :/ 
If so, $$margin \space of \space error = \frac {1}{\sqrt {sample \space size}}$$

rogue · Answer

Normally, it is $$margin \space of \space error = z \times \frac {\sigma}{\sqrt n}$$