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Montgomery, Peck, and Vining (2001) report on a study in which a rocket motor is formed by binding an igniter propellant and a sustainer propellant together inside a metal housing. The shear strength of the bond between the two propellant types is an important characteristic. Results of testing 20 randomly selected motors are shown in the following table. Test the hypothesis that the median shear strength is 2000 psi using the Wilcoxon Signed-Rank Test.
Observation
Shear Strength, psi
1
2458
2
2390
3
2478
4
1497
5
2135
6
2379
7
1963
8
2070
9
2699
10
2191
11
2208
12
2123
13
1663
14
2042
15
2081
16
2045
17
2460
18
1745
19
1970
20
1719
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