z**********i
发帖数: 12276 | 1 有个SURVEY DATA.
其中,几个选择题来反映一个方面的问题.
比如DIETARY BEHEVIOR,
第一个问题是,过去30天内,每天吃几次水果? 7个选择
第二个问题是,过去30天内,每天吃几次蔬菜? 7个选择
第三个问题是,过去30天内,几次没有吃饱? 5个选择
怎样来把3个问题合并成1个VARIABLE?
多谢建议! | z**********i
发帖数: 12276 | 2 顶一下.多谢回复!
另一个PHYSICAL ACTIVITY BEHEVIOR 问题:
1. During the past 7 days, on how many days were you physically active for a
total of at least 60 minutes per day?
A. 0 days B. 1 day C. 2 days D. 3 days
E. 4 days F. 5 days G. 6 days H. 7 days
2. During a typical or usual week, on how many days are you physically
active for a total of at least 60 minutes per day?
A. 0 days B. 1 day C. 2 days D. 3 days E. 4 days
F. 5 days G. 6 days H. 7 days
3. How much time do you spend during a typical or usual day sitting and
watching television, playing computer games, talking with friends, or doing
other sitting activities, such as main play station?
A. Less than 1 hour per day
B. 1 to 2 hours per day
C. 3 to 4 hours per day
D. 5 to 6 hours per day
E. 7 to 8 hours per day
F. More than 8 hours per day
4. During the past 7 days, on how many days did you walk or ride a bicycle
to and from school?
A. 0 days B. 1 day C. 2 days D. 3 days E. 4 days
F. 5 days G. 6 days H. 7 days
5. During the past 7 days, how long did it usually take for you to get to
and from school each day?
ADD UP THE TIME YOU SPEND GOING TO AND COMING HOME FROM SCHOOL.
A. Less than 10 minutes per day
B. 10 to 19 minutes per day
C. 20 to 29 minutes per day
D. 30 to 39 minutes per day
E. 40 to 49 minutes per day
F. 50 to 59 minutes per day
G. 60 or more minutes per day
【在 z**********i 的大作中提到】
: 有个SURVEY DATA.
: 其中,几个选择题来反映一个方面的问题.
: 比如DIETARY BEHEVIOR,
: 第一个问题是,过去30天内,每天吃几次水果? 7个选择
: 第二个问题是,过去30天内,每天吃几次蔬菜? 7个选择
: 第三个问题是,过去30天内,几次没有吃饱? 5个选择
: 怎样来把3个问题合并成1个VARIABLE?
: 多谢建议!
| G**7
发帖数: 391 | 3 Did you check the correlation between the variables? If r is high, you
might consider to use one variable instead of several. Or, use data
reduction technique. On the other hand, you may check literature. | a****g
发帖数: 8131 | 4 貌似你有许多相关的问题
通常我会做一个factor analysis,也就是上面777提到的data reduction
proc factor is the tool
【在 z**********i 的大作中提到】
: 有个SURVEY DATA.
: 其中,几个选择题来反映一个方面的问题.
: 比如DIETARY BEHEVIOR,
: 第一个问题是,过去30天内,每天吃几次水果? 7个选择
: 第二个问题是,过去30天内,每天吃几次蔬菜? 7个选择
: 第三个问题是,过去30天内,几次没有吃饱? 5个选择
: 怎样来把3个问题合并成1个VARIABLE?
: 多谢建议!
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