do.grades: Do Grades

In ProfessR: Grades Setting and Exam Maker

Do Grades

Description

Calculate the grades of a class of students, given raw scores on exam

Usage

do.grades(ggrades, divs = NULL, cut = 0, tit = "Exam Grades",
breaks=length(ggrades)/3, ...)

Arguments

ggrades	Raw grades
divs	divisions for grades (optional)
cut	low end Cut off to remove 0 from statistics
tit	Title for Figure
breaks	breaks for the histogram, default=length(ggrades)/3
...	other parameters for hist

Details

To remove students who do not take the test a low end cut off is used to excise any grades below that level. Both mean, and standard deviations are shown as well as median and quartiles.

Value

grades=ggrades, lett=letts, scor=scores, divs=divs, LETS=LETS, SCRS=SCRS, hist=HA LIST:

grades	raw scores
lett	letter grades
scor	scaled grades
divs	divisions, estimated by user or provided as input
LETS	letter grades assigned
SCRS	Scores related to LETS
hist	histogram structure

Note

Grades are determined linearly within a division

Author(s)

Jonathan M. Lees<[e-mail]>

See Also

jist, DUMPgrades, getlet

Examples

g = rnorm(n=130, m=82, sd=10)
g[g>100] = 100
g[g<1] = 1

B = boxplot(g)

##########   set divisions automatically:

divs = c(min(g), B$stats[1:4] + diff(B$stats)/2, max(g) )



###  to run interactively, remove the divs
###  D1 = do.grades(g, tit="GEOL 105 Exam 1")

### otherwise use previously calculated divs:
D1 = do.grades(g, divs=divs, tit="GEOL 105 Exam 1")

## Not run: 

####  this is interactive
D1 = do.grades(g, tit="GEOL 105 Exam 1")

#######  list the grades:
cbind(D1$grades,  D1$lett,  D1$scor)

####### if you have names or ID's try:
#######  cbind(IDs, D1$grades,  D1$lett,  D1$scor)

\dontrun{

 DUMPgrades(D1, file="TEST1grades", id=IDS )
}


## End(Not run)

ProfessR documentation built on Aug. 21, 2023, 9:07 a.m.