[讨论]一道spss题目
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一部分可以用列联表的卡方检验来检验纤维的种类（fiber）和膨胀感(float)是否独立。
另一部分用单因素分析消耗掉的热量对于每一种纤维的饼干是否显著来检测减肥效果。
不知道这样做对不对，以及还需要其他方法吗？谢谢。Story Name: High Fiber
Diet Plan
Story Topics:
Health
Datafile Name:
Fiber
Methods:
Contingency
table , Chi square
test
Abstract: A
manufacturer was considering marketing crackers high in a certain kind of
edible fiber as a dieting aid. Dieters would consume some crackers before a
meal, filling their stomachs so that they would feel less hungry and eat less.
A laboratory studied whether people would in fact eat less in this way.
Overweight female subjects ate crackers with different types of fiber
(bran fiber, gum fiber, both, and a control cracker) and were then allowed to
eat as much as they wished from a prepared menu. The amount of food they
consumed and their weight were monitored, along with any side effects they
reported. Unfortunately, some subjects developed uncomfortable bloating and gastric
upset from some of the fiber crackers. A contingency table of
"Cracker" versus "Bloat" shows the relationship between the
four different types of cracker and the four levels of severity of bloating as
reported by the subjects.
A Chi-Square test can be used to test whether Bloating is independent of
Cracker (the type of fiber eaten).
Image: The residuals
from the Contingency Table help to find the cells where the violation of the
null hypothesis is greatest.
Datafile Name: Fiber
Datafile Subjects:
Health
Story Names:
High
Fiber Diet Plan
Reference: This data
is distributed with the software package, Data Desk? Data Description, Inc.
(1993). Data Desk?
Authorization:
Description: Effects of
dietary fiber. 12 female subjects were fed a controlled diet. Before each meal
they ate crackers containing either bran fiber, gum fiber, a combination of
both, or no fiber (control). Their caloric intake was monitored. Subjects
reported any gastric or other problems.
Number of cases: 12
Variable Names:
- Cracker: Type
of fiber in the cracker
- Diet: One of
four diets (type of cracker)
- Subject: An
identification for each of the 12 subjects
- Digested:
Digested calories. Difference between caloric intake and calories passed
through system
- Bloat: Degree
of bloating and flatulence reported by the subjects
The Data:
Cracker
Diet Subject
Digested Bloat
control
1 3 1772.84
none
bran 4 3 1752.63
low
combo 3 9 2121.97
med
gum 2 4 2558.61
high
gum 2 1 2026.91
med
bran 4 1 2047.42
low
combo 3 1 2254.75
low
control
1 1 2353.21
med
combo 3 2 2153.36
none
gum 2 2 2331.19
none
bran 4 2 2547.77
none
control
1 2 2591.12
none
gum 2 3 2012.36
low
combo 3 3 1956.18
low
combo 3 4 2025.97
none
bran 4 4 1669.12
none
control
1 4 2452.73
none
bran 4 5 2207.37
low
gum 2 5 1944.48
med
control
1 5 1927.68
low
combo 3 5 2190.1 high
control
1 6 1635.28
none
combo 3 6 1693.35
low
bran 4 6 1707.34
low
gum 2 6 1871.95
high
gum 2 7 2245.03
none
combo 3 7 2436.79
low
control
1 7 2667.14
low
bran 4 7 2766.86
none
bran 4 8 2279.82
none
combo 3 8 1844.77
high
gum 2 8 2002.73
high
control
1 8 2220.22
med
control
1 9 1888.29
low
gum 2 9 1804.27
high
bran 4 9 2293.27
med
bran 4 10 2357.4 none
control
1 10 2359.9 none
combo 3 10 2292.46
low
gum 2 10 2433.46
high
gum 2 11 1681.86
low
control
1 11 1902.75
none
bran 4 11 2003.16
none
combo 3 11 2137.12
med
combo 3 12 2203.07
med
control
1 12 2125.39
low
gum 2 12 2166.77
med
bran 4 12 2287.52
none
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