data a;
input gp$ n X S;
cards;
A 5 2.46 0.37
B 5 2.41 0.18
C 5 3.02 0.04
D 5 4.03 0.90
;
proc sql;
吉尔吉斯族create table b as
select sum(n) as N, /*计算总例数N*/
count(n) as k, /*计算组数k*/
sum(n*X**2)-sum(n*X)**2/sum(n) as SSZJ, /*计算组间变异*/
sum(S**2*(n-1)) as SSZN /*计算组内变异*/
from a;
quit;
data c;
佛山金马影剧院set b;
MSZJ=SSZJ/(k-1); /*计算组间均方*/
MSZN=SSZN/(N-k); /*计算组内均方*/
F=MSZJ/MSZN; /*计算F值*/
pubmed数据库P=1-probf(F,k-1,N-k); /*计算P值*/
proc print data=c;
var F P; /*显示F值,P值*/
run;
/*以下进行两两比较计算,采用LSD-t检验*/
data d;
set c;猎德小学
keep N k MSZN;
proc sql;
create table e as
select a1.gp as gp1,a2.gp as gp2, /* 交叉匹配生成两两比较数据集*/
a1.n as n1,a2.n AS n2,
a1.X AS X1,a2.X as X2
from a as a1, a as a2
where a1.gp<a2.gp;
create table f as
select e.*,d.* from e ,d; /*生成两两比较计算表 */
quit;
data g;
set f;
羟基磷酸钙dmean=x1-x2;
地球物理学报
sd=sqrt(MSZN*(1/n1+1/n2));
t=dmean/sd;
p=(1-probt(abs(t),n-k))*2;
proc print data=g;
var gp1 gp2 n1 n2 x1 x2 dmean t p; /*显示两两比较结果*/
run;