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Six Sigma Lean Master Black Belt Certification Questions Part 3
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Question : 9 of 40
Marks:
+1
,
-0
Which statement(s) are incorrect for the Regression Analysis shown here? (Note: There are 2 correct answers).
Regression Analysis: Turbine Output versus Air-Fuel Ratio, % steam, ...
The Regression Equation it
Turbine Output
=
16.5
+
3.21
=16.5+3.21
=
16.5
+
3.21
Air-Fuel Ratio
+
0.386
%
+0.386\%
+
0.386%
methane
+
0.0166
+ 0.0166
+
0.0166
Steam Exit Temp
Predictor
Coef
SE Coef
T
P
Constant
16.488
16.488
16.488
2.918
2.918
2.918
5.65
5.65
5.65
0.000
Air-Fuel Ratio
3.2148
3.2148
3.2148
9.2377
9.2377
9.2377
13.52
13.52
13.52
0.000
% methane
0.38637
0.38637
0.38637
0.07278
0.07278
0.07278
5.31
5.31
5.31
0.000
Steam Exit Temp
0.016576
0.016576
0.016576
0.004273
0.004273
0.004273
3.88
3.88
3.88
0.004
S
=
0.508616
S=0.508616
S
=
0.508616
R
−
S
q
=
98.6
%
{R}-{Sq}=98.6\%
R
−
Sq
=
98.6%
R
−
S
q
(
a
d
j
]
)
=
98.2
%
{R}-{Sq}({adj}])=98.2\%
R
−
Sq
(
a
d
j
])
=
98.2%
Arialysis of Variance
Source
DF
SS
MS
F
P
Regression
3
170.003
56.668
219.06
0.000
Residual Error
9
2.326
0.259
Total
12
172.331
Source.
DF
Seq SS
Air-Fuel Ratio
1
159.048
% Methane
1
7.062
Steam Exit.Temp
1
3.892
The air-fuel ratio explains most of the TurbineOutput variation
The Regression explains over 98% of the process variation
This Multiple Linear Regression has three statistically significant independent variables
If the air-fuel ratio increases by 1, the TurbineOutput more than triples
The SteamExitTemp explains the most variation of the TurbineOutput
Validate
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