Kizspy | Question: 67
(Choose 1 answer)
(See picture)
Α. (3.6; 5.0)Β. (3.2; 5.4)
C. (3.8; 4.8)
D. (3.5; 5.1)
E. None of the other choices is correct
Two types of flares are tested for their burning times (in minutes) and sample results are given below
Brand X: n=35 , \overline{x}=19.4 , s=1.4
Brand Y: n=40 \overline{x}=15.1 , s=0.8
Construct a 95% confidence interval for the dif-ferences μχ µy based on the sample data.Assume that the two samples are independent and that they have been randomly selected.
Let t0.025,34-2.032 and 10.025,73-1.993.
