Compressive strength (in thousand psi) was measured on 60 specimens of a

new aluminum alloy undergoing development as a material for the next generation of aircraft.

66.4 67.7 68.0 68.0 68.3 68.4 68.6 68.8 68.9 69.0 71.9 72.1 72.2 72.3 72.4

69.2 69.3 69.3 69.5 69.5 69.6 69.7 69.8 69.8 69.9 72.6 72.7 72.9 73.1 73.3

70.0 70.1 70.2 70.3 70.3 70.4 70.5 70.6 70.6 70.8 74.2 74.5 75.3 70.4 68.8

71.0 71.1 71.2 71.3 71.3 71.5 71.6 71.6 71.7 71.8 69.5 67.3 72.5 70.2 73.2

Suppose that you have four 10 km segments to your automobile trip. You

drive your car: (1) 100 km/hr for the first 10 km (2) 110 km/hr for the second 10 km

(3) 90 km/hr for the third 10 km (4) 120 km/hr for the fourth 10 km

The probability that any one of two engines on an aircraft will not fail is 0.95. Assuming that

both engines operate independently of each other, the probability that both engines will not fail is: