Question 1159559
You need the mean, the sd, the sample size.
the mean is 9.333
the sd for the sample is 2.872
the sample size is 9

90%CI is mean +/- t(0.95, df=9) s/sqrt(n)
the half-interval is 1.86*2.872/3=1.78

the 90% CI is ($7.55, $11.11)