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Exploratory Data Analysis | Qingyuan Zhao
https://www.statslab.cam.ac.uk/~qz280/tag/exploratory-data-analysis/3 Jun 2024: The increasing availability and scale of Genome Wide Association Studies (GWAS) bring new horizons for understanding biological mechanisms. -
PathGPS 1 PathGPS: Discover shared genetic architecture using GWAS ...
https://www.statslab.cam.ac.uk/~qz280/publication/pathgps/paper.pdf3 Jun 2024: email: hastie@stanford.edu. Summary: The increasing availability and scale of biobanks and “omic” datasets bring new horizons for un-. ... multiple new hypotheses for future investigations. Key words: GWAS; Pathway analysis; Structural equation model; -
Research
https://www.statslab.cam.ac.uk/~rjs57/Research.html21 Jun 2024: Chen, W., Mazumder, R. and Samworth, R. J. (2024) A new computational framework for log-concave density estimation. ... Selected recent talks. Log-concavity: New theory and methodology (Berlin, January 2013) (.pdf, 392K). -
Probability J.R. Norris January 22, 2024 1 Contents 1 ...
https://www.statslab.cam.ac.uk/~james/Lectures/p.pdf22 Jan 2024: P(A|B) = P(A B)P(B). For fixed B, we can define a new function P̃ : F [0,1] by. -
NON-SELF-TOUCHING PATHS IN PLANE GRAPHS GEOFFREY R. GRIMMETT…
https://www.statslab.cam.ac.uk/~grg/papers/qt-matching7.pdf12 Feb 2024: These new vertices are called facial sites,. and the graph Ĝ is called the facial graph of G. ... For A C(G), we shall construct a new cycle B = Ext(A) called the exteriorcycle of A. -
PERCOLATION CRITICAL PROBABILITIESOF MATCHING LATTICE-PAIRS GEOFFREY…
https://www.statslab.cam.ac.uk/~grg/papers/percprob-rsa6.pdf20 Feb 2024: graph, denoted Ĝ, that is obtained from G by placing a new vertex within eachnon-triangular face of G and joining this new vertex to each vertex of the face. ... These new verticesare called facial sites, or simply sites in order to distinguish them -
Small Data, Big Time—A retrospect of the first weeks of COVID-19
https://www.statslab.cam.ac.uk/~qz280/publication/covid-19-retrospect/paper.pdf3 Jun 2024: Similar to many other new human diseases, there was an initial period of confusion. ... The leftpanel shows the new incidences with no exposure to the Huanan Seafood Market; the right panel showsthe logarithm of the cumulative incidences. -
Mathematics of Machine LearningRajen D. Shah…
https://www.statslab.cam.ac.uk/~rds37/teaching/machine_learning/notes.pdf12 Mar 2024: form new datasets D1,. ,DB and performs the following. 1. For each b = 1,. ... New convex functions from old:. (i) Let g : C R be a (strictly) convex function. -
Lecture Notes on Statistical Modelling Qingyuan Zhao December 2, ...
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/notes.pdf3 Jun 2024: The cycle: conjecture–design–experiment–analysis leads to a new cycle of conjecture–design–experiment–analysis and so on. ... 2 log f(Yn1; θ̂) | θ̂. }where the expectation is taken over a new observation Yn1. -
Statistical modellingLecturer: Alberto J. Coca…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/notes_3Dec19.pdf3 Jun 2024: Then,. Var(β̃) = σ2(XTX)1 σ2DDT = Var(β̂) σ2DDT. In particular, β̂ being BLUE means that given a new observation x Rp, we can estimatethe regression function at x optimally ... 9. Prediction intervals. Let x Rp be a new observation. We can -
https://www.statslab.cam.ac.uk/~qz280/tag/mendelian-randomization/inde…
https://www.statslab.cam.ac.uk/~qz280/tag/mendelian-randomization/index.xml3 Jun 2024: 2021/ Mendelian randomization: Old and new insights https://www.statslab.cam.ac.uk/qz280/talk/penn-biostat-2021/ Fri, 16 Apr 2021 18:00:00 0000 ... uk/qz280/talk/penn-biostat-2021/ Mendelian randomization: Old and new insights -
A note on post-treatment selection in studying racial discrimination…
https://www.statslab.cam.ac.uk/~qz280/publication/policing-risk-ratio/3 Jun 2024: We propose using an estimand new for this context—the causal risk ratio, which has more transparent interpretation and requires weaker identification assumptions. -
Qingyuan Zhao | Qingyuan Zhao
https://www.statslab.cam.ac.uk/~qz280/author/qingyuan-zhao/3 Jun 2024: I am interested in improving the general quality and appraisal of statistical research, including new methodology and a better understanding of causal inference, novel study designs, sensitivity analysis, multiple testing, and -
Migrating my website to Hugo + Academic + ox-hugo | Qingyuan Zhao
https://www.statslab.cam.ac.uk/~qz280/post/migrating/3 Jun 2024: To add this new publication to my webpage, I can execute the following command. ... So my homepage only contains two widgets. Additionally, I created a custom widget page called news to make announcements and display new content. -
Richard Nickl’s Publications Page Books [A] Mathematical foundations…
https://www.statslab.cam.ac.uk/~nickl/Site/publications.html10 May 2024: Bernoulli News 24 (2) (2017) 5-9. -
Frank Kelly's papers
https://www.statslab.cam.ac.uk/~frank/PAPERS/30 Mar 2024: Rui Carvalho, Lubos Buzna, Richard Gibbens and Frank Kelly. New J. ... Tariffing in the new IP/ATM environment. -
Lecture Notes on Causal Inference(with corrections) Qingyuan Zhao May …
https://www.statslab.cam.ac.uk/~qz280/teaching/causal-2023/notes-2021.pdf3 Jun 2024: Treatment Ai A = {0, 1}. Example: a new drug. – -
Statistical Modeling: Returning to its roots | Qingyuan Zhao
https://www.statslab.cam.ac.uk/~qz280/post/breiman-reprint-2021/3 Jun 2024: Scientific research is usually an iterative process. The cycle: conjecture-design-experiment-analysis leads to a new cycle of conjecture-design-experiment-analysis and so on. ... statisticians (including me) are trained to develop new techniques and most -
Bayesian Non-linear Statistical Inverse Problems
https://www.statslab.cam.ac.uk/~nickl/Site/__files/FINALBOOKPDF.pdf16 Jan 2024: 1) For m 2 N and given #m, generate a new draw (the ‘proposal’). ... The statistical intuition behind this algorithm is simple: We compute the new(conditionally Gaussian) proposal sm and perform a likelihood ratio test against theprevious position #m -
Is this estimand really an average treatment effect? | Qingyuan Zhao
https://www.statslab.cam.ac.uk/~qz280/post/policing-ate-estimand/3 Jun 2024: The new paper shows that a weaker assumption called subset ignorability is sufficient for the identification. -
https://www.statslab.cam.ac.uk/~qz280/post/index.xml
https://www.statslab.cam.ac.uk/~qz280/post/index.xml3 Jun 2024: We invented some new notation to distinguish some different types of graph connections/separations. ... Macros for the new notation can be found in the file below:</p> <p> <a -
https://www.statslab.cam.ac.uk/~qz280/index.xml
https://www.statslab.cam.ac.uk/~qz280/index.xml3 Jun 2024: We invented some new notation to distinguish some different types of graph connections/separations. ... Macros for the new notation can be found in the file below:</p> <p> <a -
https://www.statslab.cam.ac.uk/~qz280/tag/causal-inference/index.xml
https://www.statslab.cam.ac.uk/~qz280/tag/causal-inference/index.xml3 Jun 2024: The cycle: conjecture-design-experiment-analysis leads to a new cycle of conjecture-design-experiment-analysis and so on. ... The new paper shows that a weaker assumption called subset ignorability is sufficient for the identification. -
https://www.statslab.cam.ac.uk/~qz280/tag/philosophy/index.xml
https://www.statslab.cam.ac.uk/~qz280/tag/philosophy/index.xml3 Jun 2024: Philosophy | Qingyuan Zhao https://www.statslab.cam.ac.uk/qz280/tag/philosophy/ Philosophy Source Themes Academic (https://sourcethemes.com/academic/) en-us 2024 Tue, 10 Jan 2023 09:27:00 0000 -
SISCER Module 12 Causal Inference with Observational Data: Common…
https://www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L0.pdf3 Jun 2024: I I develop new methods and apply causal inference methods to answer scientificquestions. ... I New methodology and better understanding of causal inference;. I Novel study designs;. -
Practical: Randomization inference
https://www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/S1.pdf3 Jun 2024: would be violated if, for example,the hospital staff need some time to adjust to the new system.). -
1-dgk.dvi
https://www.statslab.cam.ac.uk/~grg/books/hammfest/1-dgk.pdf22 Mar 2024: be made to bring before school teachers a review of the exciting and reallyquite simple — but new — kinds of mathematics that could easily andusefully be added to the curriculum, whether they -
SISCER Module 12 Lecture 4: Matched Case-Control Studies
https://www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L4.pdf3 Jun 2024: New England Journal of Medicine,284(15):878–881. Rosenbaum, P. R. (1991). Sensitivity analysis for matched case-control studies. -
STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 2: More on…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P2.pdf3 Jun 2024: Writing functions. When writing anything but a short algorithm, it is often easiest to edit the commands from a text file.In Rstudio create a new Rscript using CtrlShiftN. -
PUBLICATIONS OF DOMINIC WELSH 1962 [1] J. M. Hammersley ...
https://www.statslab.cam.ac.uk/~grg/papers/welsh-bib.pdf6 Jun 2024: Springer, New York, 1969. [14] D. J. A. Welsh. Transversal theory and matroids. ... Math. Appl., volume 72, pages 133–148. Springer, New York, 1995. [80] L. -
MATHEMATICS OF MACHINE LEARNING Part IIExample Sheet 2 (of ...
https://www.statslab.cam.ac.uk/~rds37/teaching/machine_learning/Qu2.pdf20 Feb 2024: To decide the winner, the classifiers are applied to n new i.i.d.datapoints (the so-called test data). -
SISCER Module 12 Lecture 1: Randomization inference
https://www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L1.pdf3 Jun 2024: 12 wards in 2 hospitals were randomized to switch from an old model of weekendallied health services to no services, before adopting a new model of services.(You can visualize the ... Rosenbaum, P. R. (2002). Observational Studies. Springer Series in -
STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 6: Binomial…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P6.pdf3 Jun 2024: new function, do? ... Fit a new model such that the z-test for the coefficient of mumMyopicanswers this question. -
STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 1:…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P1.pdf3 Jun 2024: par(new=TRUE). Experiment with other distributions and other sample sizes. Exercises. -
STATISTICAL MODELLING Part IIC, Michaelmas 2021 Practical 8:…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P8.pdf3 Jun 2024: One new piece of information in thesummary is the estimate of the dispersion parameter, which is based on the estimate. ... For a betteralternative, see the practical video.) Try fitting a new model with this term removed and store this inGammaMod0.Is -
STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 3: Linear…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P3.pdf3 Jun 2024: Omitting the last observation pushes the estimatesfor the coefficients almost to the edge of their 23% confidence ellipsoid—not necessarily a big cause forconcern.Now create a new response y2 as ... predict.lm) can be used to give xT β̂ for a new -
STATISTICAL MODELLING Part IIC, Michaelmas 2019Practical 2: More on…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P2S.pdf3 Jun 2024: Now, let’s see what happens if we make some of the true coefficients different from 0.# Compute t-statistics in 10000 simulations from the new modelt_stat_mat2 <- -
Confounder Selection via Iterative Graph Expansion Qingyuan Zhao…
https://www.statslab.cam.ac.uk/~qz280/talk/lse-2024/slides.pdf3 Jun 2024: They provided a new definition: “a pre-exposure covariate C for which there exists a set of othercovariates X such that effect of the exposure on the outcome is unconfounded conditional -
Using sparsity to overcome unmeasured confounding:Two examples…
https://www.statslab.cam.ac.uk/~qz280/talk/mrc-bsu-2019/slides.pdf3 Jun 2024: Old and new problems. Epidemiology and public health: effectiveness of prevention/treatment, causaleffect of risk factors, etc. ... Qingyuan Zhao (Stats Lab) Specificity MRC-BSU Seminar 27 / 30. New MR results. -
Small Data, Big Time—A retrospect of the first weeks of COVID-19
https://www.statslab.cam.ac.uk/~qz280/talk/rss-2021/slides.pdf3 Jun 2024: Jun 9 New naming system for variants of interest and concern. ... Two initial studies. 1 Q. Li, et al. Early transmission dynamics in Wuhan, China, of novel coronavirusinfected pneumonia.New England Journal of Medicine. -
Discovering Mechanistic Heterogeneity using Mendelian Randomization
https://www.statslab.cam.ac.uk/~qz280/talk/pcic-2020/slides.pdf3 Jun 2024: Genetic studies of body mass index yield new insightsfor obesity biology”. -
Confounder Selection via (Iterative) Graph Expansion Qingyuan Zhao…
https://www.statslab.cam.ac.uk/~qz280/talk/pcic-2023/slides.pdf3 Jun 2024: Outline. 1 Review. 2 New approach. Qingyuan Zhao (Cambridge) Confounder selection September 17, 2023 2 / 17. ... Outline. 1 Review. 2 New approach. Qingyuan Zhao (Cambridge) Confounder selection September 17, 2023 3 / 17. -
Multiple conditional randomization tests
https://www.statslab.cam.ac.uk/~qz280/talk/ims-2022/slides.pdf3 Jun 2024: How should we resolve this? Our proposal. Use a new term—quasi-randomization tests. ... 2 To provide a unifying framework that incorporates many old and new ideasabout multiple conditional randomization tests. -
Comment on “Causal inference using invariant prediction” Qingyuan…
https://www.statslab.cam.ac.uk/~qz280/publication/invariant-prediction-comment/comment.pdf3 Jun 2024: proteins. Using their own method, Sachs et al. [2005] reportedly recovered 15of the known directed arcs and discovered two new putative links (not shown),and missed 3 of the interactions which -
Bootstrapping Sensitivity Analysis
https://www.statslab.cam.ac.uk/~qz280/publication/sensitivity-ipw/slides.pdf3 Jun 2024: Rosenbaum’s paradigm New bootstrap approach. Population Sample Super-population. Design Matching Weighting. ... Statistical Science, 17(3):309–321, 2002. P. R. Rosenbaum. Observational Studies. Springer New York, 2002. -
STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 4: More on…
https://www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P4.pdf3 Jun 2024: Fit a new linear model omitting thisobservation and also omitting the Screens variable. -
Curriculum Vitae
https://www.statslab.cam.ac.uk/~qz280/files/cv.pdf20 Mar 2024: May 2022–Apr 2025 EPSRC New Investigator Award “Statistical Inference for Novel Study De-signs” (£246,805; sole PI). ... 2017 Atlantic Causal Inference Conference, New York, New York, USA; University of Bristol(MRC Integrative Epidemiology Unit). -
Simultaneous Hypothesis Testing using Internal Negative Controls…
https://www.statslab.cam.ac.uk/~qz280/publication/ranc/slides.pdf3 Jun 2024: Solid threshold: A “new” method. There are two ways to obtain this threshold:. -
Mendelian randomization
https://www.statslab.cam.ac.uk/~qz280/talk/mr-tutorial/slides.pdf3 Jun 2024: Advanced lipoprotein testingA “new” technology—Nuclear Magnetic Resonance (NMR)—can nowmeasure subclass traits such as. ... 39/40. MR screening for lipoprotein subclasses. Scientific TakeawayI The new results show clear heterogeneity among HDL. -
Selection bias in 2020 Qingyuan Zhao Statistical Laboratory,…
https://www.statslab.cam.ac.uk/~qz280/talk/ocis-2020/slides.pdf3 Jun 2024: Common mistake: New data Existing model = New results. Qingyuan Zhao (Stats Lab, Cambridge) Selection bias in 2020 Dec.
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