Assignment:
Old Faithful Refer to Data Set in Appendix B and determine the best regression equation that expresses the response variable ( y) of time interval after an eruption in terms of one or more of the variables of duration, time interval before the eruption, and height of the eruption. Explain your choice.
Data Set: Old Faithful Geyser
Measurements are from eruptions of the Old Faithful Geyser in Yellowstone National Park. Prediction errors are based on predicted times to the eruption, where a negative value corresponds to an eruption that occurred before the predicted time.
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STATDISK:
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Data set name is OldFaith.
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Minitab:
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Worksheet name is
OLDFAITH.MTW.
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Excel:
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Workbook name
is OLDFAITH.XLS.
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TI-83/84 Plus:
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App name is OLD-
FAITH and the file
names are the
same as for text
files.
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Text file names:
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Text file names
are OFDUR,
OFBEF, OFAFT,
OFHT, OFERR.
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Data Set: Old Faithful Geyser
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Duration
(sec)
|
Interval
Before
(min)
|
Interval
After
(min)
|
Height
(ft)
|
Prediction
Error
(min)
|
|
240
|
98
|
92
|
140
|
4
|
|
237
|
92
|
95
|
140
|
2-
|
|
250
|
95
|
92
|
148
|
1
|
|
243
|
87
|
100
|
130
|
7-
|
|
255
|
96
|
90
|
125
|
2
|
|
120
|
90
|
65
|
110
|
4-
|
|
260
|
65
|
92
|
136
|
0
|
|
178
|
92
|
72
|
125
|
2-
|
|
259
|
95
|
93
|
115
|
1
|
|
245
|
93
|
98
|
120
|
1-
|
|
234
|
98
|
94
|
120
|
4
|
|
213
|
94
|
80
|
120
|
0
|
|
255
|
93
|
93
|
150
|
1-
|
|
235
|
93
|
83
|
140
|
1-
|
|
250
|
96
|
89
|
136
|
2
|
|
110
|
89
|
66
|
120
|
5-
|
|
245
|
93
|
89
|
148
|
1-
|
|
269
|
89
|
86
|
130
|
5-
|
|
251
|
86
|
97
|
130
|
8-
|
|
234
|
69
|
105
|
136
|
4
|
|
252
|
105
|
92
|
130
|
13
|
|
254
|
92
|
89
|
115
|
0
|
|
273
|
89
|
93
|
136
|
3-
|
|
266
|
93
|
112
|
130
|
1
|
|
284
|
112
|
88
|
138
|
20
|
|
252
|
95
|
105
|
120
|
3
|
|
269
|
105
|
94
|
120
|
13
|
|
250
|
94
|
90
|
120
|
2
|
|
261
|
90
|
98
|
95
|
2-
|
|
253
|
98
|
81
|
140
|
6
|
|
255
|
81
|
101
|
125
|
11-
|
|
280
|
69
|
94
|
130
|
4
|
|
270
|
94
|
92
|
130
|
2
|
|
241
|
92
|
106
|
110
|
0
|
|
272
|
106
|
93
|
110
|
14
|
|
294
|
93
|
96
|
125
|
1
|
|
220
|
108
|
87
|
150
|
21
|
|
253
|
87
|
97
|
130
|
5-
|
|
245
|
97
|
86
|
120
|
5
|
|
274
|
102
|
92
|
95
|
10
|