IBdoc Posted February 20, 2009 Report Share Posted February 20, 2009 Since I'm taking both chemistry and biology, I get confused on whether I should treat the uncertainties in the same way. In bio lab reports, should uncertainty be propagated too? Or do we only put uncertainties in tables and graphs? And do we take the smallest division of a lets say the cylinder used? Or one tenth of the smallest division like we do in chemistry? Reply Link to post Share on other sites More sharing options...
Eternalx Posted February 21, 2009 Report Share Posted February 21, 2009 [quote name='IBdoc' post='37464' date='Feb 21 2009, 04:58 AM']Since I'm taking both chemistry and biology, I get confused on whether I should treat the uncertainties in the same way. In bio lab reports, should uncertainty be propagated too? Or do we only put uncertainties in tables and graphs? And do we take the smallest division of a lets say the cylinder used? Or one tenth of the smallest division like we do in chemistry?[/quote] I do physic and chemistry and I treat the uncertainty for both the same. But i would suggest for you to go and ask your teacher for more accurate information. After all they're the ones teaching and marking you. Reply Link to post Share on other sites More sharing options...
Toffu-san Posted February 22, 2009 Report Share Posted February 22, 2009 [quote name='IBdoc' post='37464' date='Feb 20 2009, 07:58 PM']Since I'm taking both chemistry and biology, I get confused on whether I should treat the uncertainties in the same way. In bio lab reports, should uncertainty be propagated too? Or do we only put uncertainties in tables and graphs? And do we take the smallest division of a lets say the cylinder used? Or one tenth of the smallest division like we do in chemistry?[/quote] I do physic, chemistry and biology. And the three teachers I have, want different uncertainties; better talk to your teachers because the uncertainties are so personal. Reply Link to post Share on other sites More sharing options...
moneyfaery Posted February 22, 2009 Report Share Posted February 22, 2009 I never propagated uncertainties for bio (received 7 for my IAs) so I'm guessing it's not absolutely necessary. Wouldn't hurt if you did though. Imo, it's kind of pointless since there's more error from using biological material than systematic error from the equipment and apparatus. Reply Link to post Share on other sites More sharing options...
IBdoc Posted February 22, 2009 Author Report Share Posted February 22, 2009 Haha, exactly what I thought. I only put uncertainties in my data tables but I don't propagate. Yeah, and since u got 7s then it's certainly not necessary. Thanks guys. Reply Link to post Share on other sites More sharing options...
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