Question 1182177
The mean is 4465.42 seconds 
the sd is 357.85 seconds
sample size is 12
90%CI (seconds) is t(0.95, df=12)*s/sqrt(n)
=1.796*357.85/sqrt(12)
=185.53
the interval is 4465.42+/-185.53
or (4279.9, 4651.0) seconds