5. Suppose you have a data set: Experiment 56 880 Control 15 398 Experiment 30 4

Question

5. Suppose you have a data set:

Experiment 56 880

Control       15 398

Experiment 30 479

Control       18 293

Experiment 35 365

Control       22 984

Control        13 230

Control        20 432

Experiment 34 560

Variables are treatment, weight (g), area (m2), please create a SAS program that:

(A). Reading the data and create a SAS data set;

(b). Create a new variable wt_per_area, using wt_per_area=weight/area and change the unit of weight from g to kg;

(c). Sort the data set by treatment;

(d). Calculate the mean, standard error of weight, area and wt_per_area;

(e). Calculate the mean and standard error for treatment=”experiment” and “control”.

Explanation / Answer

SAS code:

/*create a SAS data set*/
data avi;
input treatment$1-10 weight area;
datalines;
Experiment 56 880
Control 15 398
Experiment 30 479
Control 18 293
Experiment 35 365
Control 22 984
Control 13 230
Control 20 432
Experiment 34 560
;
run;
proc print data=avi;
run;
/*(b)new variable wt_per_area, using wt_per_area=weight/area and change the unit of weight from g to kg*/
data avi3;
set avi;
wt_per_area=weight/(area*1000);
run;
proc print data=avi3;
run;
/*(c)Sort the data set by treatment*/
proc sort data=avi3 out=avi3_sort;
by treatment;
proc print data=avi3_sort;
run;
/*(d)mean, standard error of weight, area and wt_per_area*/
proc means data=avi3_sort;
run;
/*(e) mean and standard error for treatment=”experiment” and “control”*/
proc means data=avi3_sort;
by treatment;
run;

SAS output:

The MEANS Procedure

The MEANS Procedure

treatment=Control

treatment=Experiment

Obs treatment weight area 1 Experiment 56 880 2 Control 15 398 3 Experiment 30 479 4 Control 18 293 5 Experiment 35 365 6 Control 22 984 7 Control 13 230 8 Control 20 432 9 Experiment 34 560

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.