A new type of flare accelerant is tested. A control group of flares(X) that are currently used and a group of flares(Y) with the new accelerant are tested for their burning times(in minutes) and a90% confidence interval for XY is calculated as(3.85,4.75). Based on this confidenceinterval, what, ifany, conclusions can bedrawn?

A.

Since all of the values in the interval are greater than0, it can be concluded that the mean burning time for the control group is shorter than the mean burning time for the flares with the new accelerant.

B.

Since all of the values in the interval are greater than0, it can be concluded that the mean burning time for the control group is longer than the mean burning time for the flares with the new accelerant.

C.

Since all of the values in the interval are greater than0, it can be concluded that the mean burning time for the control group is the same as the mean burning time for the flares with the new accelerant.

D.

Since all of the values in the interval are greater than0, there is not enough evidence to conclude that the mean burning times differ for the two types of flares.