Which of the following sample sizes, all other things being equal, will produce the most precise (narrowest) confidence interval? 900 1200 25 100 all will produce the same interval because the...

Which of the following sample sizes, all other things being equal, will produce the most precise (narrowest) confidence interval?

1. 900


2. 1200


3. 25


4. 100


5. all will produce the same interval because the calculation depends only on the mean and the standard deviation