⟩ The standard error has been calculated as 2.6 and the sample mean is 10.00. Thus the 95% confidence interval lies between
1. 4.904 to 15.096
2. 7.40 to 12.60
3. 3.85 to 26
4. There is not enough information available to work out the confidence interval.
Answer: 4.904 to 15.096