One novel procedure of making green gasoline takes biomass in the form of sucrose and converts it into gasoline using catalytic reactions. At one step in a pilot plant process, a chemical engineer measures the out of carbon chains of length three. Nine runs with same catalyst produced the yields (gal)
.63 2.64 1.85 1.09 1.67 0.73 1.04 .68
What can the chemical engineer assert with 95% confidence about the maximum error if she used the sample to estimate true mean yield.