c**********e
发帖数: 2007 | 1 I have a sample of patients, each has variable
weight (w), height (h) and blood pressure (p).
How to compare corr(w,h) and corr(w, p) in SAS?
What is the statistical test?
Thanks a lot, | A*********u
发帖数: 8976 | 2 用 proc corr
I have a sample of patients, each has variable
weight (w), height (h) and blood pressure (p).
How to compare corr(w,h) and corr(w, p) in SAS?
What is the statistical test?
Thanks a lot,
【在 c**********e 的大作中提到】
: I have a sample of patients, each has variable
: weight (w), height (h) and blood pressure (p).
: How to compare corr(w,h) and corr(w, p) in SAS?
: What is the statistical test?
: Thanks a lot,
| x******n
发帖数: 173 | 3 proc corr;
var w*(h p);
【在 c**********e 的大作中提到】
: I have a sample of patients, each has variable
: weight (w), height (h) and blood pressure (p).
: How to compare corr(w,h) and corr(w, p) in SAS?
: What is the statistical test?
: Thanks a lot,
| c**********e
发帖数: 2007 | 4 It looks that my SAS 9.1.3 does not recognize it. Have you
tried on your SAS version? Thanks a lot. The error is as
following:
981 proc corr;
982 var x*(y z);
-
22
-
200
ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, :,
_ALL_, _CHARACTER_,
_CHAR_, _NUMERIC_.
ERROR 200-322: The symbol is not recognized and will be ignored.
983 run;
【在 x******n 的大作中提到】
: proc corr;
: var w*(h p);
| x******n
发帖数: 173 | 5 my fault
proc corr;
var x y z;
【在 c**********e 的大作中提到】
: It looks that my SAS 9.1.3 does not recognize it. Have you
: tried on your SAS version? Thanks a lot. The error is as
: following:
: 981 proc corr;
: 982 var x*(y z);
: -
: 22
: -
: 200
: ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, :,
| x******n
发帖数: 173 | 6 if you do not need yz
then
var x;
with y z;
【在 c**********e 的大作中提到】
: It looks that my SAS 9.1.3 does not recognize it. Have you
: tried on your SAS version? Thanks a lot. The error is as
: following:
: 981 proc corr;
: 982 var x*(y z);
: -
: 22
: -
: 200
: ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, :,
| c**********e
发帖数: 2007 | 7 Thanks. But my problem is to test if two correlations
are equal. For example, proc corr gives corr(x,y)=0.6
and corr(x,z)=0.7. Are the two correlations signicantly
different? (Apparently, sample size makes a difference.)
【在 x******n 的大作中提到】
: if you do not need yz
: then
: var x;
: with y z;
| x******n
发帖数: 173 | 8 I do not have an idea available now
maybe you can try the nonparametric method, Spearson's correlation?
【在 c**********e 的大作中提到】
: Thanks. But my problem is to test if two correlations
: are equal. For example, proc corr gives corr(x,y)=0.6
: and corr(x,z)=0.7. Are the two correlations signicantly
: different? (Apparently, sample size makes a difference.)
| w***z
发帖数: 28 | 9 just woudering: corr(w,h) and corr(w, p) are just two numbers, how can and
possible to do statistical test for 2 numbers?
have a sample of patients, each has variable
weight (w), height (h) and blood pressure (p).
How to compare corr(w,h) and corr(w, p) in SAS?
What is the statistical test?
Thanks a lot, | s*r
发帖数: 2757 | 10 how can we do statistical test for 2 means?
【在 w***z 的大作中提到】
: just woudering: corr(w,h) and corr(w, p) are just two numbers, how can and
: possible to do statistical test for 2 numbers?
: have a sample of patients, each has variable
: weight (w), height (h) and blood pressure (p).
: How to compare corr(w,h) and corr(w, p) in SAS?
: What is the statistical test?
: Thanks a lot,
| c**********e
发帖数: 2007 | 11 Thanks anyway. I have found some way to do it.
Not in SAS. Just a formula.
【在 x******n 的大作中提到】
: I do not have an idea available now
: maybe you can try the nonparametric method, Spearson's correlation?
| o****o
发帖数: 8077 | 12 sample correlation has an approximatly normal distribution after Fisher's z-
transformation
【在 s*r 的大作中提到】
: how can we do statistical test for 2 means?
| c**********e
发帖数: 2007 | 13 It is a little bit more complicated because the two correlations
hence the two t-values are not independent.
z-
【在 o****o 的大作中提到】
: sample correlation has an approximatly normal distribution after Fisher's z-
: transformation
| o****o
发帖数: 8077 | 14 that's why I didn't give out an answer
I was replying to Sir(郎)
【在 c**********e 的大作中提到】
: It is a little bit more complicated because the two correlations
: hence the two t-values are not independent.
:
: z-
|
|
