Two Brands of Flares - Brand 1 and Brand 2 $\bar { x } _ { 1 } - \bar { x } _ { 2 } = 4.3$

Multiple Choice

Two brands of flares - Brand 1 and Brand 2 - are tested for their burning times (in minutes) .A random sample of 40 of each brand of flare are burned and timed,and the difference in sample means is found to be $\bar { x } _ { 1 } - \bar { x } _ { 2 } = 4.3$ .Ten subsequent bootstrap samples from each of these original samples yield the following values of $\bar { x } _ { 1 } ^ { * } - \bar { x } _ { 2 } ^ { * }$ : 5.8,1.7,2.9,4.9,6.1,5.2,7.0,5.5,4.6,3.3.Based on these ten values,find the bootstrap of the standard error of $\bar { x } _ { 1 } - \bar { x } _ { 2 }$ .

A) 1.6193
B) 0.5121
C) 4.7
D) 2.6222
E) 3.4545