3/23/25, 7:20 CHEM210 Theory Flashcards |
AM
CHEM210 THEORY EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
Terms in this set (45)
what is standard deviation? a measurement of how closely data is clustered about the mean
what is formal concentration? the number of moles of a species per one litre of solution
F-test compares standard deviation between two data sets,
what is the F-test and t-test?
t-set compares the mean between two data sets --> tests to
see if they are "significantly different"
F(calc) = (sd1)^2/(sd2)^2, where s1 is greater than s2
what is the formula for the F-
test: F(calc)? what do the If Fcalc > Ftable, then the results are significantly different
results of the F-test tell you? and the null hypothesis should be rejected
If tcalc > ttable, then results are significantly different and
what do the results of the t-test
tell you? null hypothesis should be rejected
the range of values within which there is a probability of containing
the "true" value
What is a confidence interval?
what is the formula? confidence interval = (mean) +- ts/sqrt(n)
-where t = student's t, using table and DOF n-1
-where s = standard deviation
-where n = number of trials
the grubbs test tests for a possible outlier in a data set,
determines if that "suspicious" point should be rejected
what is the grubbs test? what is
Gcalc = |Potential outlier - mean|/s
the formula and what do the
results tell you?
If Gcalc > Gtable, then the questionable value is an outlier
(greater than a 5% chance of it not being a member of the
population) and should be rejected
a method used to draw the best straight line through a
what is the method of least
squares? set of KNOWN data points to create a calibration curve ->
this can then be used to solve for unknowns
1/
9
, 3/23/25, 7:20 CHEM210 Theory Flashcards |
AM
2/
9
AM
CHEM210 THEORY EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
Terms in this set (45)
what is standard deviation? a measurement of how closely data is clustered about the mean
what is formal concentration? the number of moles of a species per one litre of solution
F-test compares standard deviation between two data sets,
what is the F-test and t-test?
t-set compares the mean between two data sets --> tests to
see if they are "significantly different"
F(calc) = (sd1)^2/(sd2)^2, where s1 is greater than s2
what is the formula for the F-
test: F(calc)? what do the If Fcalc > Ftable, then the results are significantly different
results of the F-test tell you? and the null hypothesis should be rejected
If tcalc > ttable, then results are significantly different and
what do the results of the t-test
tell you? null hypothesis should be rejected
the range of values within which there is a probability of containing
the "true" value
What is a confidence interval?
what is the formula? confidence interval = (mean) +- ts/sqrt(n)
-where t = student's t, using table and DOF n-1
-where s = standard deviation
-where n = number of trials
the grubbs test tests for a possible outlier in a data set,
determines if that "suspicious" point should be rejected
what is the grubbs test? what is
Gcalc = |Potential outlier - mean|/s
the formula and what do the
results tell you?
If Gcalc > Gtable, then the questionable value is an outlier
(greater than a 5% chance of it not being a member of the
population) and should be rejected
a method used to draw the best straight line through a
what is the method of least
squares? set of KNOWN data points to create a calibration curve ->
this can then be used to solve for unknowns
1/
9
, 3/23/25, 7:20 CHEM210 Theory Flashcards |
AM
2/
9
