round 2.0469 to two significant figures - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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myke

Member

Registered: 7th Feb 01
Location: High Wycombe, Buckinghamshire
User status: Offline

17th Nov 05 at 14:38

what i believe to be conventional rounding has just been rubbished by my boss, so i'm curious

dna23

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Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline

17th Nov 05 at 14:39

2.04 imo

Lawrah

Premium Member

Registered: 25th Dec 04
User status: Offline

17th Nov 05 at 14:39

2.0

i think..

stuartmitchell

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Registered: 24th Apr 04
Location: Kirkliston, Edinburgh
User status: Offline

17th Nov 05 at 14:39

I thought rounding occured after the deciaml place so in this instance it would be 2.05

This is becasue the 4th number ie 6 is >5 therefore you round the 3rd number ie 4 up to 5 hence

2.05

[Edited on 17-11-2005 by stuartmitchell]

gianluigi

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Registered: 9th Mar 05
Location: Ipswich, Suffolk
User status: Offline

17th Nov 05 at 14:40

2.1

Lawrah

Premium Member

Registered: 25th Dec 04
User status: Offline

17th Nov 05 at 14:40

http://science.widener.edu/svb/tutorial/sigfigures.html

Ally

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Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline

17th Nov 05 at 14:40

2.04

gianluigi

Member

Registered: 9th Mar 05
Location: Ipswich, Suffolk
User status: Offline

17th Nov 05 at 14:41

2 significant figures means 2 digits not 3

Lawrah

Premium Member

Registered: 25th Dec 04
User status: Offline

17th Nov 05 at 14:42

therefor do you not round down the 4...

Ally

Member

Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline

17th Nov 05 at 14:42

thought it ment significant numbers after the decimal place

dna23

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Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline

17th Nov 05 at 14:43

quote:
Originally posted by gianluigi
2 significant figures means 2 digits not 3

0 is not considered a significant figure unless between another digit but with this ending in a 0 you have to take the next digit to include it... something like that

CCA

Member

Registered: 6th Dec 04
Location: Somewhere Drives: Not a bloody Vauxhall!
User status: Offline

17th Nov 05 at 14:44

To one decimal place it would be 2.0, i think

Tom

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Registered: 3rd Apr 02
Location: Wirral, Merseyside
User status: Offline

17th Nov 05 at 14:44

2.04, so 2.0

gianluigi

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Registered: 9th Mar 05
Location: Ipswich, Suffolk
User status: Offline

17th Nov 05 at 14:44

the way i did it was the 9 will round the 6 up to 7, the 7 will round the 4 upto 5 and the 5 will round the 0 upto 1,

i was taught that you round 5 up

stuartmitchell

Member

Registered: 24th Apr 04
Location: Kirkliston, Edinburgh
User status: Offline

17th Nov 05 at 14:44

Ian will know

Edd

Member

Registered: 8th Nov 04
Location: Glasgow
User status: Offline

17th Nov 05 at 14:44

2.0

dna23

Member

Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline

17th Nov 05 at 14:44

quote:
Zeros to the left of a significant figure and not bounded to the left by another significant figure are not significant. For example the number 0.01 only has one significant figure.

dna23

Member

Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline

17th Nov 05 at 14:45

your all doing decimal places, they dont work the same as measured/exact significant figures.

gianluigi

Member

Registered: 9th Mar 05
Location: Ipswich, Suffolk
User status: Offline

17th Nov 05 at 14:46

i have forgotten all my maths and statistic lessons

this is worrying

Carl

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Registered: 9th May 04
Location: Jimmy Bennett's la la land.
User status: Offline

17th Nov 05 at 14:46

quote:
Originally posted by stuartmitchell
I thought rounding occured after the deciaml place so in this instance it would be 2.05

This is becasue the 4th number ie 6 is >5 therefore you round the 3rd number ie 4 up to 5 hence

2.05

[Edited on 17-11-2005 by stuartmitchell]

I agree with this.

[Edited on 17-11-2005 by Carl]

Lawrah

Premium Member

Registered: 25th Dec 04
User status: Offline

17th Nov 05 at 14:48

quote:
Originally posted by gianluigi
the way i did it was the 9 will round the 6 up to 7, the 7 will round the 4 upto 5 and the 5 will round the 0 upto 1,

i was taught that you round 5 up

hhaahaha

stuartmitchell

Member

Registered: 24th Apr 04
Location: Kirkliston, Edinburgh
User status: Offline

17th Nov 05 at 14:48

quote:
Originally posted by Carl

quote:
Originally posted by stuartmitchell
I thought rounding occured after the deciaml place so in this instance it would be 2.05

This is becasue the 4th number ie 6 is >5 therefore you round the 3rd number ie 4 up to 5 hence

2.05

[Edited on 17-11-2005 by stuartmitchell]

I agree with this.

[Edited on 17-11-2005 by Carl]

Tom

Member

Registered: 3rd Apr 02
Location: Wirral, Merseyside
User status: Offline

17th Nov 05 at 14:48

quote:
Originally posted by Carl

quote:
Originally posted by stuartmitchell
I thought rounding occured after the deciaml place so in this instance it would be 2.05

This is becasue the 4th number ie 6 is >5 therefore you round the 3rd number ie 4 up to 5 hence

2.05

[Edited on 17-11-2005 by stuartmitchell]

I agree with this.

[Edited on 17-11-2005 by Carl]

This seems to easy though, I am scpetical of my own logic

so usually pick the one I think to be wrong

gianluigi

Member

Registered: 9th Mar 05
Location: Ipswich, Suffolk
User status: Offline

17th Nov 05 at 14:48

quote:
Originally posted by Lawrah

quote:
Originally posted by gianluigi
the way i did it was the 9 will round the 6 up to 7, the 7 will round the 4 upto 5 and the 5 will round the 0 upto 1,

i was taught that you round 5 up

hhaahaha

what?

Lawrah

Premium Member

Registered: 25th Dec 04
User status: Offline

17th Nov 05 at 14:50

Thats the most rediculous thing i have ever heard...

Rule 1- if the remainder beyond the last digit to be reported is less than 5, drop the last digit. Rounding to one decimal place, the number 5.3467 becomes 5.3.

Rule 2-if the remainder is greater than 5, increase the final digit by 1. The number 5.798 becomes 5.8 if rounding to 1 digit.

Rule 3- To prevent rounding bias, if the remainder is exactly 5, then round the last digit to the closest even number.Thus the number 3.55 (rounded to 1 digit) would be 3.6 (rounding up) and the number 6.450 would round to 6.4 (rounding down)if rounding to 1 decimal.
See page 12 in Hurlburt, R. (1994) Comprehending Behavioral Statistics, Brooks/Cole, Pacific Grove, CA.

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