Interpreting the Outfile

This form is an example of OUTFILE. It is the document created by running casstat in Frontier. Each colored section represents one part of the file. By changing the defaults in casstat these sections can be removed.

Colored sections are:

Purple – Headings and Footings
Red - Sorted List
Green - Post List
Blue - Analysis List
Black - Indicates titles and lines to separate sections. Any text printed in black does not appear in OUTFILE.

This line indicates a break between two sections:

OUTPUT DATA FROM THE OPTICAL MARK READER
SORTED BY NAME WITHIN SECTION.
SECTIONS ARE SHOWN IN COLUMN 78 OF LINE 1 IN EACH RECORD.

Sorted List

DATA KEY:
    - ITEM LEFT BLANK
    * MULTIPLE RESPONSE

GPG001 0001 1P #000 ANSWER KEY ---------- -- -- -- - -------4-- 050 050 000 100%
43122431112324314315424133144211214321344433221145---------------------------------------
-----------------------------------------------------------------------------------------

GPG001 0005 1 #000 COWBOY JOE A PB123456789- -- -- -- - -----4 -- 050 011 039 022%
52525424244133523512151224141452314325231245421413---------------------------------------
-----------------------------------------------------------------------------------------

GPG001 0004 1 #000 COWBOY JANE A PB987654321- -- -- - M -----4 -- 050 008 042 016%
25524422524145225433451311442423135325451235535542---------------------------------------
-----------------------------------------------------------------------------------------

GPG001 0006 1 #000 PUBLIC JOHN Q C654987321- -- -- -- - -----6 -- 050 010 040 020%
14441231415132225542152154142523422332135314221251---------------------------------------
-----------------------------------------------------------------------------------------

GPG001 0002 1 #000 DOE JANE 321654987- -- -- -- - -----6 -- 050 007 043 014%
21451211355112125554132515541434412422441325222351---------------------------------------
-----------------------------------------------------------------------------------------

STATISTICS - GROUP 	RECORD 	RAW 	RAW 		% 	%
			COUNT 	MEAN 	STANDARD 	MEAN 	STANDARD
					DEVIATION 		DEVIATION

		1 	5 	9.20 	1.64 		18.40 	3.29

KEYS = 1 TESTS GRADED = 5 	OVER ALL MEAN % SCORE = 18.40 	3.29

OUTPUT DATA FROM THE OPTICAL MARK READER
SORTED BY ID NUMBER, SPECIAL CODE, THEN DOCUMENT NUMBER WITHIN GROUPS.

MARKING CODES:
	- ITEM LEFT BLANK OR LIGHT MARK 	CLASS
	* MULTIPLE RESPONSE 			==============================
	. CORRECT RESPONSE 
						INSTRUCTOR
						==============================

Post List

ANSWER KEY 1 100% 4312243111 2324314315 4241331442 1121432134 4433221145

ID-NUMBER S-CODE GRADE RESPONSES

123456789- -----4 022% 525.5.2424 41335235.2 151224..14 523....523 12454..413
987654321- -----4 016% 255.4.2252 4145225433 .513114.24 23135..545 12.55355.2
654987321- -----6 014% 2145121.35 5112125554 1325155.14 344.24.24. 1325..2351
321654987- -----6 020% 144412..4. 5132225542 152.54..25 23422.3213 5314...251
555555555- -----4 020% 32..5.22.5 1143522442 1514252..5 .21.215345 22211.54.4

TOTAL ITEMS 50
TOTAL STUDENTS 5
HIGH SCORE 22%
MEAN SCORE 18.40%
ST. DEV. 3.29
LOW SCORE 14%


00/06/00.

FILE
zzzdata, BATCH 1 GROUP 1 ITEM ANALYSIS, PROPORTION OF PEOPLE RESPONDING PROP, POINT-BISERIAL
CORRELATION = RPBI

Analysis List

	SUMMARY OF STATISTICS

		NUMBER OF ITEMS 			50

		MEAN SCORE 		              9.20

		MEDIAN SCORE 			     10.00

		STANDARD DEVIATION 		      1.64

		RELIABILITY (KR-20) 		    -0.673

		POSSIBLE LOW SCORE 			 0
		POSSIBLE HIGH SCORE 			50

		OBTAINED LOW SCORE 			 7
		OBTAINED HIGH SCORE 			11

		NUMBER OF SCORES 			 5
			BLANK SCORES			 0
			INVALID SCORES			 0
			VALID SCORES			 5

00/06/00.

FILE 
zzzdata, BATCH 1 GROUP 1 ITEM ANALYSIS, PROPORTION OF PEOPLE RESPONDING PROP, POINT-BISERIAL
CORRELATION = RPBI

				TEST FREQUENCY DISTRIBUTION


RAW 	STANDARD 	PER			CUM
SCORE 	SCORE		CENTILE PERCENT FREQ 	FREQ
							EACH * REPRESENTS 1 PERSON(S)
11 	610 	 	90 	20.0 	1 	5 	*
10 	549 		60 	40.0 	2 	4 	**
9 	488 		40 	0.0 	0 	2
8 	427 		30 	20.0 	1 	2 	*
7 	366 		10 	20.0 	1 	1 	*


00/06/00.

FILE zzzdata, BATCH 1 GROUP 1 ITEM ANALYSIS, PROPORTION OF PEOPLE RESPONDING PROP, POINT-
BISERIAL CORRELATION = RPBI

			THE QUINTILE GRAPH AND MATRIX OF RESPONSES
			APPEARING WITH EACH ITEM ARE BASED ON THE
			STATISTICS INDICATED IN THE TABLE BELOW :
	     QUINTILE 	   SAMPLE SIZE 	     PROPORTION       SCORE RANGE


		1ST 		1 		0.20 		11 - 11
		2ND 		2 		0.40 		10 - 10
		3RD 		1 		0.20 		8 - 9
		4TH 		1 		0.20 		7 - 7
		5TH 		0 		0.00 		0 - 0


00/06/00.

FILE zzzdata, BATCH 1 GROUP 1 ITEM ANALYSIS, PROPORTION OF PEOPLE RESPONDING PROP, POINT-
BISERIAL CORRELATION = RPBI


ITEM 1	PERCENT OF CORRECT RESPONSE BY FIFTHS	MATRIX OF RESPONSES BY FIFTHS
						    D IS CORRECT RESPONSE

						      A     B     C    (D)    E    OMIT 
1ST * 						1ST   0     0     0     0     1     0
2ND * 						2ND   1     0     1     0     0     0
3RD * 						3RD   0     1     0     0     0     0
4TH * 						4TH   0     1     0     0     0     0
5TH * 						5TH   0     0     0     0     0     0
    +---+---+---+---+---+---+---+---+---+---+
	10  20  30  40  50  60  70  80  90  100 
						PROP 0.20  0.40 0.20( 0.00) 0.20 0.00
						RPBI 0.24 -0.84 0.24( 0.00) 0.55 0.00