ENGRD2700
Fall 2008
HWK#2
1
．
(a)The quantile plot is:
1.0
0.8
0.6
0.4
0.2
0.0
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
Quantile
Sorted OP
Scatterplot of Sorted OP vs Quantile

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(b)
3.0
2.7
2.4
2.1
1.8
1.5
1.2
Op
NoOp
Data
Dotplot of Op, NoOp
NoOp
Op
3.0
2.5
2.0
1.5
1.0
Data
Boxplot of Op, NoOp

( c)
3.0
2.5
2.0
1.5
1.0
3.0
2.5
2.0
1.5
1.0
NoOp
OP
Sorted OP * Sorted NoOp
C8 * C9
Variable
Scatterplot of Sorted OP vs Sorted NoOp, C8 vs C9
We can infer that the quantile of Op is always larger than NoOp, since the Q-Q plot lies
strictly above the 45 degree straight line.
(d)
We do the interpolation for the observations of Operations, then we get the Q-Q plot:

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