Question: In a study of the flammability of material used in children’s sleepwear, the char length (in inches) for five samples of washed acetate/nylon brushed tricot fabric was measured. The resulting observations were:

8.1 10.4 9.5 8.9 10.7

Assuming that char length is normally distributed variable, compute a 95% confidence interval for the true average char length of this fabric. (5 points)