Class Notes (1,100,000)
CA (620,000)
UTSG (50,000)
CSC (1,000)
Lecture 23

# CSC302H1 Lecture 23: 2014.04.01

Department
Computer Science
Course Code
CSC302H1
Professor
Matt Medland
Lecture
23

This preview shows half of the first page. to view the full 1 pages of the document.
! EFFORT ESTIMATION

o
estimated
(
F
)
≤ estimated
(
N
)
∙ estimated
(
T
)
o
 !!"#\$
\$%%!"#\$
An estimate&!' (
)(
oThree-point Estimating*!
)
wi
&(+
mi
&) 
bi
&!+
E=
i
wi+4mi+bi
6
Condence Intervals
oCondence Intervals for Work Factor
(!(
!! !*
!! (!(

#!((,!! \$ 
-,\$.
x-axis&!!
y-axis&!- ./&
,!! (!((-!.&
,\$!(-!.+
0()!! 
!&1
2-
.()&1
23(3(45%) 678(
/&5
oCondence Intervals for Feature Estimation
,\$
oCondence Intervals for Delta (from Capacity
Constraint)
F

N
&!
T
&9
F
 !
!
f1, f 2, … , f k
0
f1, f 2, … , f k
!!! 
!
6&

:\$'
'
\$!
F
) !

!!
dev1, dev2, … , devn
;) !!<&!
\$2
D
(
T
)
=N ∙ T F
&
,&(
)
T

P
(
D
(
T
)
0
)
!9
 *
D
(
T
)
80
2
-&5(+8
P
(
D
(
F
)
500
)
=90
.
-(+8
P
(
D
(
F
)
5
)
=90
.
#&\$9
(78&
1
(=&
578
:2
# #(
=(-!.6
=9