6
Example 43
Find A, B, and C for the following data using quadratic regression and
estimate y’ = ? for x = 58 and x’ =? for y =143
n
1
2
3
x
57
61
67
y
101
117
155
[ MODE ] 3 [
]
Pwr Inv Quad
1
2
3
3 [ 2nd ] [ Scl ] [ = ]
REGDEG
Scl
0.
57 [
,
] 101 [ DT ] 61 [
,
] 117 [ DT ]
REGDEG
67 [
,
] 155 [ DT ] [ 2nd ] [ A ] [ = ]
A
M
684.3
[ 2nd ] [ B ] [ = ]
REGDEG
B
M
23.53333333
[ 2nd ] [ C ] [ = ]
REGDEG
C
M
0.233333333
58 [ 2nd ] [
∧
y
]
REGDEG
∧
y
M
104.3
143 [ 2nd ] [
∧
x
]
REGDEG
∧
x
1
M
65.36790453
[ 2nd ] [
∧
x
]
REGDEG
∧
x
2
M
35.48923833
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