Test 1 data analysis for Kydex, Royal Blue Cotton, and Silicon along with test 4 data analysis for Raychem Electrical Wire is presented

Beeson, Harold D.

Hirsch, David

NASA Technical Reports Server

I 
Source of Acquisition j NASA Johnson Space center 
2004 
Kydex, WSTF No. 04-38645 
25.9% 02 @ 14.3 psia 
0 
0 
Shaded cells in the Test Results Table indicate individual results that do not fit the overall NASA 
STD 6001 pasdfail pattern 
Shaded cells in h column indicate a probability of at least 95% that the average value is 
significantly different than the averages fiom other labs 
Shaded cells in k column indicate greater within-laboratory variability than the average for ail 
laboratories 
Data analysis 
0 
Considering NASA STD 6001 padfail criteria, all labs provided consistent results 
Statistically there was no significant inconsistency among the average values obtained by the labs 
ESA obtained results with greater within-laboratory variability than the average for all 
laboratories. The critical k has been exceeded, indicating that statistically the variability was 
significantly larger when compared with variability fiom all labs combined 
Statistically, two extreme data points (1.0 cm, ESA and 4.6 cm, WSTF) could occur by chance 
within the ESA and WSTF data population, respectively, less than 5% of the time. There is a 
possibility for these data points to have resulted fiqm nonrandom causes. 
1993-2002 round robin history: With three exceptions, all labs passed this material under these 
conditions in the past. 
Probability of a sample failing: 3.1% 
h, = 1.49 
&= 1.66 
https://ntrs.nasa.gov/search.jsp?R=20070021328 2019-08-30T01:14:19+00:00Z
Test 1 Data Analysis (Continued) 
Kydex, WSTF No. 38645 
30% O2 @ 10.2 psia 
5.42 I 0.25 I -1.24 I I 0.20 1 
Data analysis 
0 
0 
Considering NASA STD 6001 pasdfail criteria, all labs provided consistent results 
Statistically there was no significant inconsistency among the average values obtained by the labs 
ESA obtained results with greater within-laboratory variability than the average for all 
laboratories. The critical k has been exceeded, indicating that statistically the variability was 
significantly larger when compared with variability from all labs combined 
Statistically, three extreme data points (6.7 cm, JAXA; 9.9 cm, MSFC; 14.8 cm, ESA) could occur 
by chance within the respective data populations less than 5% of the time. There is a possibility 
for these data points to have resulted from nonrandom causes. 
2000-2002 round robin history: With one exception, all labs passed this material under these conditions 
in the past. 
Probability of a sample failing: 2.5% 
&= 1.49 
&= 1.66 
Test 1 Data Analysis (Continued) 
Royal Blue Cotton, Flame Resistant (WST No. 04-38644) 
30% O2 @ 10.2 psia 
Data analysis 
* 
Considering NASA STD 6001 padfail criteria, the labs provided inconsistent results. MSFC 
failed the material, while all other labs passed it 
Never-the-less, statistically there was no significant inconsistency among the average values 
obtained by any labs 
The critical k has not been exceeded, indicating that statistically the intra-laboratory variability 
was not great enough to cause concern for any of the labs 
Statistically, two extreme data points (16.8 cm, MSFC; 14.0 cm, ESA) could occur by chance 
within the MSFC and ESA population, respectively, less than 5% of the time. There is a 
possibility for these data points to have resulted from nonrandom causes. 
Round robin history: This material was tested for the first time in 2004. 
&= 1.49 
&= 1.66 
Test 1 Data Analysis (Continued) 
Silicone 
20.9% O2 @ 14.7 psia 
Data analysis 
Considering NASA STD 6001 pasdfail criteria, the labs provided inconsistent results. JAXA 
failed the material, while all other labs passed it 
Never-the-less, statistically there was no significant inconsistency among the average values 
obtained by any labs 
The critical k has not been exceeded, indicating that statistically the intra-laboratory variability 
was not great enough to cause concern for any of the labs 
Statistically, four extreme data points (16.5 cm, JAXA, 14.0 cm, MSFC; 7.6 cm, WSTF; 7.6 cm, 
KSC) could occur by chance within the respective data populations less than 5% of the time. 
There is a possibility for these data points to have resulted f3om nonrandom causes. 
Round robin history: This material was tested for the first time in 2004. 
hc,= 1.74 
b= 1.71 
Test 4 Data Analysis 
JAXA MSFC 
5.5 10.9 
10.3 5.3 
11.3 15.0 
13.0 21.1 
11.5 24.6 
WSTJ? 
28.7 
26.7 
29.7 
17.0 
16.0 
X,, S"4 
SAXA 10.32 2.56 
MSFC 15.38 6.92 
WSTF 23.62 5.90 
Considering NASA STD 6001 passifail criteria, the labs provided inconsistent results on the 
material. MSFC and WSTF failed the material, while JAXA passed it. The data indicates that the 
test conditions were close to the sustained flammability threshold, where variable effects are 
enhanced. 
However, statistically there was no significant inconsistency among the average values obtained 
by the labs and the critical k has not been exceeded, indicating that statistically the intra-laboratory 
variability was not significantly larger when compared with variability fiom all labs combined. 
These results can be explained by the relatively low values for h and k, due to the relative large 
data variability 
Statistically, one data point (5.5 cm, JAXA) could occur by chance within the JAXA data 
population less than 5% of the time. There is a possibility for this data point to have resulted fiom 
nonrandom causes. 
d X a w  SX Sr h k 
-6.12 16.44 6.71 5.45 -0.91 0.47 
-1.06 0.16 0.19 
7.18 1.07 1.08 
1993-2003 round robin history: 
Probability of a sample passing: 3 1 % 
Probability of all samples passing: 6% 
Probability of all samples failing: 33% 
Probability of obtaining mixed results: 61% 
br= 1.15 
br= 1.56 
Test 4 Data Analysis 
Raychem Electrical Wire, MIL M8 1044/12-20-9 
20.9% O2 @ 14.7 psia 
Test Results (Burn Lengths, cm) 
JAXA 
5.7 
6.0 
6.0 
10.0 
7.0 
MSFC WSTF ESA 
9.4 7.4 6.0 
6.6 8.1 5.5 
5.8 7.9 7.5 
6.4 4.6 5.0 
11.4 6.1 5.0 4 
Data analysis 
* 
* 
0 
Considering NASA STD 6001 pass/fail criteria, all labs provided consistent results 
Statistically there was no significant inconsistency among the average values obtained by the labs 
The critical k has not been exceeded, indicating that statistically the intra-laboratory variability 
was not great enough to cause concern for any of the labs 
Statistically, three extreme data points (10.0 cm, JAXA; 4.6 cm, WSTF; 7.5 cm, ESA) could occur 
by chance within the respective data populations, respectively, less than 5% of the time. There is a 
possibility for these data points to have resulted from nonrandom causes. 
1993-2002 round robin history: With three exceptions, all labs passed this material under these 
conditions in the past. 
Probability of a sample failing: 3.0% 
h, = 1.49 
b= 1.66 


Rr2004 Test1 and 4 Data Analysis

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