, accuracy - Correct Answer - closeness of the mean to the "true value"
precision - Correct Answer - reproducibility of individual measurements
Uncertainty in Addition/Subraction - Correct Answer - e=sqrt(ex1^2+ex2^2+ex3^2+...)
Uncertainty in Multiplication/Division - Correct Answer -
e=y*sqrt((ex1/x1)^2+(ex2/x2)^2+(ex3/x3)^2+...)
Significant Figures in Logarithms and antilogarithms - Correct Answer - the number of
significant figures in the log should equal the number of digits in the mantissa
How many significant figures in log(205.5) - Correct Answer - four significant figures, so you will
need four decimal places in your answer
pH - Correct Answer - -log[H3O+]
[H3O+] - Correct Answer - 10^-pH
Absorbance - Correct Answer - -log(transmittance)
Random Error - Correct Answer - -repeated measurements are sometimes high and sometimes
low
-cannot be corrected for
Systematic Error - Correct Answer - -repeated measurements are usually always high or
always low
-can and should be corrected for
Relative uncertainty= - Correct Answer - absolute uncertainty/magnitude of measurement
68% of measurements in a Gaussian Curve will lie - Correct Answer - between the mean-1 and
the mean+1
Variance in standard deviation - Correct Answer - standard deviation squared
mean= - Correct Answer - true value +-time*standard deviation
T-test Case 1 - Correct Answer - measure sample of known composition
T-test case 2 - Correct Answer - compare replicate measurement of an unknown sample
T-test case 3 - Correct Answer - compare individual difference of an unknown sample
- two sets of data analyzed by both methods being used
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