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Six Sigma Lean Black Belt Certification Questions Part 2
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Question : 2 of 40
Marks:
+1
,
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The class score distribution of schools in a metropolitan area is shown here along with an analysis output. Comment on the statistical significance between theMeans of the two distributions. Select the most appropriate statement.
Two-sample t for Private_School vs Public_School
N
Mean
StDev
SE Mean
Private_School
50
50
50
4.891
4.891
4.891
0.422
0.422
0.422
0.060
0.060
0.060
Public_School
50
50
50
7.15
7.15
7.15
1.87
1.87
1.87
0.26
0.26
0.26
Difference = mu (Private_School) - mu (Public_School)
Estimate for difference:
−
2.259
-2.259
−
2.259
99
%
99 \%
99%
CI for difference:
(
−
2.985
,
−
1.534
)
(-2.985,-1.534)
(
−
2.985
,
−
1.534
)
T-Test of difference
=
0
=0
=
0
(vs not
=
=
=
): T-Value
=
−
8.32
=-8.32
=
−
8.32
p-Value
=
0.000
=0.000
=
0.000
The two class Means are statistically different from each other
The two class Means statistically not different from each other
Inadequate information on class Means to make any statistical conclusions
A visual comparison shows that class Means are not statistically different
A visual comparison shows that class Means are statistically different
Validate
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