UIUC Physics 598AEM
Analysis of Experimental Measurements
Lecture Notes and Other Hand-Outs:
All Lecture Notes, Hand-Outs, etc. are in Adobe PDF Format
P598AEM Lecture Notes:
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Lecture 1
Introduction/Course Goals, Applications, Intro Concepts, Conditional Probability, Bayes Theorem, Law of Total Probability
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Lecture 2
Some examples, def'n of a random variable, PDFs and CDFs, the Uniform dist'n, change of variables, random vs. systematic uncertainties
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Lecture 3
Expectation value/true mean, variance, std. dev, skewness, kurtosis, Uniform/Cauchy/Gaussian Dist'ns, multi-dimensional Gaussian dist'ns, marginal dist'n, change of variables.
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Lecture 4
Expectation value, variance, covariance, correlation coefficient of two (or more) random variables, sample mean, variance and std. dev. of sample mean.
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Lecture 5
Taylor series expansion, matrix formalism for N random variables, covariance matrix - error propagation.
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Lecture 6
Continuation of Lect. 5: Change of Variables, the Inverse Transformation, Examples.
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Lecture 7
Approximation of a Gaussian/Normal Dist'n; Characteristic Functions; the Central Limit Theorem;
Calculating Moments of a PDF f(x) via the Characteristic Fcn.
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Lecture 8
Herschel's method of 2-D Gaussian/normal dist'n; Probability interpretation of Gaussian/normal dist'n - Confidence Intervals;
The Law of Large Numbers; Experimental sampling of a PDF, Biased and Unbiased Estimators of Low-Order Moments of a PDF; Median and Mode;
Probable Error, Reliable Error.
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Lecture 9
Multivariate Gaussian Dist'n; Orthogonal Transformations; Binomial Probability Dist'n; Multinomial Probability Dist'n;
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Lecture 10
The Poisson Probability Distribution, Poisson Double and Single-Sided Confidence Intervals,
Relationships between Binomial, Poisson and Gaussian Probability Distributions.
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Lecture 11
Hypothesis Testing, Likelihood Functions, The Maximum Likelihood Method (MLM) and Parameter Estimation, Information and Information Inequality, Biased and Un-Biased Estimators
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Lecture 12
More information on Information, Minimum Variance Estimators (MVE's), MVE's for Gaussian and Poisson Processes
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Lecture 13
The MLM vs. the Method of Moments, the MLM with many Parameters, Correlations of Parameters, the Chi2 PDF and CDF
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Lecture 14
The Extended MLM (EMLM), Use of the MLM with Binned Data, Use of {Univariate} MLM/EMLM (ANOVA) to Determine Signal vs. Background,
Generalization to Multivariate case (MANOVA), Combining Experimental Results using Log-Likelihood Functions
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Lecture 15
The Method of Least Squares, the Least Squares Principal, Surveyor's "Failure-to-Close" problem,
Least Squares Method with constraints - use of Lagrange Multipliers, properties of the Chi2 PDF, p-value, upper/lower CL's,
Pearson's Chi2 Test
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Lecture 16
More on Chi2, p-values, upper/lower CL's, Examples: Combining results of different experiments, comparing data vs. theory prediction
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Lecture 17
More on Chi2 and "errors", Example: LSQ 2-parameter fit to a straight line (y = mx + b), LSQ fit interpolation and extrapolation
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Lecture 18
General Formulation of the Least Squares Method, General Formulation of the Linear Least Squares Method, Example: LSQ Fit to a Parabola,
LSQ Polynomial Fits, Linear LSQ 2-parameter fit to a straight line (y = mx + b) when have uncertainties on both x and y.
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Lecture 19
More on the General Formulation of the Linear Least Squares Method, Example: LSQ Fit to a Parabola (II)
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Lecture 20
Combining Results via the Linear Least Squares Method, Least Squares Method vs. Maximum Likelihood Method,
The Non-Linear Least Squares Method - Newton-Raphson Method, Linear Least Squares Fits with Linear Constraints, the use of Lagrange Multipliers,
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Lecture 21
General Least Squares Method with General Constraints
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Lecture 22
Function Minimization, Finding Local Minima, Grid Search Method, Single Parameter Variation Method
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Lecture 23
Function Minimization (Continued), the Simplex Method, Gradient Methods, Method of Steepest Descent,
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Lecture 24
Function Minimization (continued), the Variable Metric Method, Function Minimization with Constraints,
Finding Multiple Minima and the Global Minimum, the Metropolis-Hastings Algorithm and Simulated Annealing
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Invariance, Covariance and Contravariance
Auxilliary Lecture on Invariance, Contravariance and Covariance of Vectors and Tensors - Coordinate Transformations
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Lecture 25
Hypothesis Testing, the Neyman-Pearson Test, Critical Regions, "Goodness-of-Fit" Chi2 Tests,
Kolmogorov-Smirnov Test(s), the Smirnov-Cramer-Von Mises Test
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Lecture 26
Monte Carlo Methods/Techniques, the Basis for Monte Carlo Integration, Properties of the MC Integral Estimate, Example: Buffon's Needle,
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Lecture 27
Random Numbers, Quasi-Random/Pseudo-Random Numbers, Multiplicative Congruential Random Number Generators, Testing Random Number Generators,
DIEHARD, TESTU01 Battery of Random Number Tests, Gaussian Random Number Generators, Triangular Random Number Generators, Square-Root Random Number Generators,
General Method for Non-Uniform Random Numbers, Exponential Random Number Generators, Uniform Cos(Theta) Distribution, Random Isotropic Distribution in 3-D,
Random Uniform Distribution on a 2-D Disk, the Von Neumann Acceptance-Rejection Method, Random Numbers from Histogram Distributions, Propagation of Large Errors,
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Lecture 28
Obtaining CL Limits Near a Physical Boundary, Bayes Theorem and Bayesian Posterior and Prior Probability Densities,
Example: Upper Limit on the Mean of a Poisson Variable with Background