/*This the data set of table 1.2-2 in section 1.2.
Please copy this who page to the window of editor in SAS and save it.
Change the data set as those in the homework assignment and run the pragram. 
Please label questions if you hand in the SAS output.*/



TITLE1  'STAT 381 Section 1.2 and 1.3';

DATA file1;

INPUT strength @@;

DATALINES ;

49.2 53.9 50.0 44.5 42.2 42.3 32.3 31.3 60.9 47.5
43.5 37.9 41.1 57.6 40.2 45.3 51.7 52.3 45.7 53.4
51.0 45.7 45.9 50.0 32.5 67.2 55.1 59.6 48.6 50.3
45.1 46.8 47.4 38.3 41.5 44.0 62.2 62.9 56.3 35.8
38.3 33.5 48.5 47.4 49.6 41.3 55.2 52.1 34.3 31.6
38.2 46.0 47.0 41.2 39.8 48.4 49.2 32.8 47.9 43.3
49.3 54.5 54.1 44.5 46.2 44.4 45.1 41.5 43.4 39.1
39.1 41.6 43.1 43.7 48.8 37.2 33.6 28.7 33.8 37.4
43.5 44.2 53.0 45.1 51.9 50.6 48.5 39.0 47.3 48.8
;
RUN;


/* Frequency Distribution as Table 1.2-2 in the textbook 
When you construct a frequency distribution for 1.2-3(a), 
please define the intervals using the steps we discussed in class.*/

PROC FORMAT;
VALUE sformat low-<32 ='28-32'		32-<36='32-36'
	      36-<40='36-40'		40-<44='40-44'
	      44-<48='44-48'		48-<52='48-52'
	      52-<56='52-56'		56-<60='56-60'
	      60-<64='60-64'		64-<68='64-68';
RUN;

PROC FREQ DATA=file1;
TABLES strength;
FORMAT strength sformat.;
RUN;


/*Basic characteristics of the sample we learn in section 1.2 and 1.3*/
PROC UNIVARIATE DATA =file1 plots ;
VAR strength;
HISTOGRAM / MIDPOINTS=30 TO 66 BY 4
            VSCALE=count;
RUN;