2002 Band Percentiles & Course Means (1 Viewer)

Lazarus

Retired
Joined
Jul 6, 2002
Messages
5,965
Location
CBD
Gender
Male
HSC
2001
Standard deviation is a measure of the 'spread' of the distribution. A larger value means that the marks were more spread out, and a smaller value means they were clumped around the mean.


Schools have access to the band percentiles and means for the courses which were studied at their school - in this particular year, those were the only courses studied at my ex-school, and so I don't have data for any others.
 

Ultimate

Unknown
Joined
Jul 12, 2002
Messages
1,009
Location
Somewhere
Gender
Male
HSC
2002
I used the band percentiles for 2002 to estimate my UAI using lazseeker advanced and only ended up with a UAI of 98.8. Yet when I put my marks into it without percentiles I got 99.5

Huge difference I reckon.
 

Lazarus

Retired
Joined
Jul 6, 2002
Messages
5,965
Location
CBD
Gender
Male
HSC
2001
I suspect the 'normal' version of LazSeeker is unnecessarily inflating UAIs by around 5 points.

The advanced version using percentiles should be much more accurate.
 

Minai

Alumni
Joined
Jul 7, 2002
Messages
7,458
Location
Sydney
Gender
Male
HSC
2002
Uni Grad
2006
Yeah ppl must use the advanced version to minimise disappointment

using the normal Lazseeker I get 96.40, using the 2002 percentiles, I get roughly 94.55
 

*DIVA*

New Member
Joined
Nov 14, 2002
Messages
7
Location
Sydney
Gender
Undisclosed
HSC
N/A
HELP ME QUICKLY!

Can someone explain to me how to use the Advanced version of Lazseeker using percentiles, not marks.

I printed out the 2002 Band Percentiles and State Exam means but dunno how to use it.

Can someone show me an example?
 

Butterfly_Wings

Cornflake Girl
Joined
Nov 5, 2002
Messages
1,020
Location
Sydney
Gender
Female
HSC
2002
*meep*
Just under half the students who did Advanced English this year got a band 5!:eek:
Suddenly my 87 seems a LOT less comforting...:(
 

mmhmm

Member
Joined
Aug 30, 2002
Messages
112
Location
syd
Goodness there is such a difference in the band percentiles with last year and this year: (these r my subjects where i noticed differences)

English (Std)
2002
band 6= 0
band 5=1.1%
band 4=29.6%
2001
band 6=0
band 5=0.35%
band 4=14.90%

IPT
2002
band 6=3.4%
band 5=14.8%
band 4=21.7%
2001
band 6=0.73%
band 5=7.38%
band 4=24.95%

Mathematics
2002
band 6=18.6%
band 5=23.1%
band 4=25.5%
2001
band 6=11.79%
band 5=29.16%
band 4=22.57%

History Extension
2002
e4=24.7%
e3=41.3%
e2=24.0%
2001
e4=51.14%
e3=39.47%
e2=7.21%

Studies of Religion 1
2002
band 6=8.0%
band 5=32.6%
band 4=39.1%
2001
band 6=0.44%
band 5=5.22%
band 4=22.87%
 

timmii

sporadic attendee
Joined
Nov 9, 2002
Messages
928
*sigh* online lazseeker uai = 100
advanced lazseeker uai = 93

how disheartening :(
 

schwang_thang

Member
Joined
Sep 6, 2002
Messages
265
Location
sydney
Originally posted by Lazarus
Standard deviation is a measure of the 'spread' of the distribution. A larger value means that the marks were more spread out, and a smaller value means they were clumped around the mean.


Schools have access to the band percentiles and means for the courses which were studied at their school - in this particular year, those were the only courses studied at my ex-school, and so I don't have data for any others.
hey laz, if the SD is relatively large, is that a bad thing?

on the other hand, if the SD is low, 4 eg in studies of religion 1unit, does this kinda mean that scaling will be higher?

sum1 once tried 2 explain SD's with me n how it may affect scaling but with a short attention span i absorbed very little...u wanna give it a go laz?
 

Lazarus

Retired
Joined
Jul 6, 2002
Messages
5,965
Location
CBD
Gender
Male
HSC
2001
The standard deviation is a measure of the 'spread' of the distribution of marks. Small SDs mean the marks were clumped around the mean, and larger SDs mean the marks were more spread out.

Generally, courses with both a high mean and a small SD will be scaled better than courses with other mean/SD combinations - there are, of course, many other factors that come into play, however.
 

mannnnndy

chocoholic
Joined
Aug 16, 2002
Messages
523
Location
northern beaches
Why is there such a large sd for chem? cause so many ppl were confident of doing well so I thought most ppl would be grouped together near the top or something.
 

Ultimate

Unknown
Joined
Jul 12, 2002
Messages
1,009
Location
Somewhere
Gender
Male
HSC
2002
If you use percentiles to calculate your UAI this year (via lazseeker) it isn't entirely accurate because this year there are more students doing the HSC so more people will get 99+ and over 90 than was the case with the HSC in 2001 which lazseeker is based on.
 

BlackJack

Vertigo!
Joined
Sep 24, 2002
Messages
1,230
Location
15 m above the pavement
Gender
Male
HSC
2002
Originally posted by mannnnndy
Why is there such a large sd for chem? cause so many ppl were confident of doing well so I thought most ppl would be grouped together near the top or something.
They must have had english markers as well at the chem exam, who picked on the grammar of students' answers. :rolleyes: That explains everything.
 

kini mini

Active Member
Joined
Sep 19, 2002
Messages
1,272
Location
Sydney
Gender
Undisclosed
HSC
2002
Originally posted by mannnnndy
I knew it! The english department is still out to get ppl for not paying enough attention in their class. :p
Bastards :p :rolleyes:
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top