The standard error of mean for a normally distributed data on 256 observations was estimated as 0.1. What would be possible limits for covering 95% of the observations if the value of mean was 60.
1
(55.2 - 62.8)
2
(56.8 - 63.2)
3
(58.8 - 65.2)
4
(60.0 - 63.0)