Statistical Methods Flashcards
Descriptive Statistics
describes estimate
of an actual value and the uncertainty
associated with estimate
Statistical Tests
Allow us to compare
estimates and uncertainties and make
conclusions about these comparisons
Random Error:
results in a scatter of results centered on the true value for repeated measurements on a single sample.
Systematic Error
results in all measurements exhibiting a definite
difference from the true value
Student’s t
a statistical tool used most
frequently to express confidence intervals
and to compare results from different
experiments
Confidence interval
an expression stating
that the true mean is likely to lie within a certain distance from the measured mean
F-test
Comparison of the precision
of measurement
S1 always larger than S2
If it is smaller, no significantly different
between two methods
Q-test
Detection of Gross Errors
Qexp= (xq −xn)/range
= gap/range
