Standard Deviation: Learn for Chemistry Lab Quiz

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Discussion Overview

The discussion revolves around the concept of standard deviation in the context of a chemistry lab quiz. Participants express confusion regarding the formula and its application, as well as related topics in chemistry such as gas stoichiometry and molarity.

Discussion Character

  • Homework-related
  • Exploratory

Main Points Raised

  • One participant expresses uncertainty about understanding standard deviation and mentions difficulty in obtaining help from their teacher.
  • Another participant asks whether the confusion is about knowing the formula or its application, seeking clarification on specific trouble areas.
  • A participant admits to not knowing the formula for standard deviation and expresses frustration over losing their notes.
  • A participant provides a link to a resource on mean-squared deviation and explains that the root mean squared deviation is derived from it.
  • One participant shares that after consulting their lab teacher, they found the concept easier than initially thought, but they struggle with gas stoichiometry and often forget material learned earlier in the semester.
  • There is a request for resources on gas stoichiometry and a mention of the common experience of students forgetting material quickly.
  • Another participant humorously suggests using the chemistry forum for related questions.

Areas of Agreement / Disagreement

Participants generally express individual struggles with understanding concepts and formulas, but there is no consensus on the best approach to learning or resolving these difficulties. The discussion remains unresolved regarding the best resources or methods for mastering the topics mentioned.

Contextual Notes

Participants reference specific challenges related to learning and retaining chemistry concepts, indicating a reliance on external resources and peer support. There are mentions of specific topics like gas stoichiometry and molarity, which may require further clarification or study.

sportsstar469
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i would post this in the chem section but more people view this one..

im having a quiz on standard deviation in chemistry lab onf riday, and I am not sure AT ALL how to do this. i tried asking the teacher but he's not to good at explaining. and i tried lookinga t the difficult to understand book on this.
 
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Do you not know the formula or do you know the formula but not know how to use it? If the latter, what part specifically are you having trouble with?
 
DaleSpam said:
Do you not know the formula or do you know the formula but not know how to use it? If the latter, what part specifically are you having trouble with?

nope i don't know ANYTHING. i ssaw the formula in class but was still confused b ut i don't even know the formula now i lost the note for it.
 
This will get you started. This is the definition of the mean-squared deviation for n measurements:
http://www.xycoon.com/mean1.htm
The rms (or root mean squared) deviation is the square root of this.
Bob S.
 
Bob S said:
This will get you started. This is the definition of the mean-squared deviation for n measurements:
http://www.xycoon.com/mean1.htm
The rms (or root mean squared) deviation is the square root of this.
Bob S.

thanks for the link bob!
but it was really easy, i asked my lab teacher today i can't believe i thought it was hard.

now if only i could do the gas stoichiometry in ideal gas equations...
i have been dealing with stoichiometry the entire semester, yet, i always forget things that ci ysed to know. for instance this is a 15 week semester, we are in week 14. i have been getting the highest grades on all the exams(its a gen chem 1 class) anyway, my teacher will be like, this unit will be easy for you, its just like limiting reagnt problems, and ill be like, oh i forgot how to do those (event hough we did them 2 weeks ago)
i8 had a quiz today and i forgot how to use molarity even..

when i get the quiz back ill probably post the question on here. does anybody have a good site to look at gas stoichiometry explanations? has anybody ever heard of students forgetting the materials so quickly.
 
We do have a chemistry forum here. (hint, hint :smile:)
 
sportsstar469 said:
thanks for the link bob!
but it was really easy, i asked my lab teacher today i can't believe i thought it was hard.

now if only i could do the gas stoichiometry in ideal gas equations...
i have been dealing with stoichiometry the entire semester, yet, i always forget things that ci ysed to know. for instance this is a 15 week semester, we are in week 14. i have been getting the highest grades on all the exams(its a gen chem 1 class) anyway, my teacher will be like, this unit will be easy for you, its just like limiting reagnt problems, and ill be like, oh i forgot how to do those (event hough we did them 2 weeks ago)
i8 had a quiz today and i forgot how to use molarity even..

when i get the quiz back ill probably post the question on here. does anybody have a good site to look at gas stoichiometry explanations? has anybody ever heard of students forgetting the materials so quickly.

jtbell said:
We do have a chemistry forum here. (hint, hint :smile:)
if i have any more questions ill post them there ;). any opinions on te paragraph i just quoted in your experience?s
 

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