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  2. www.statslab.cam.ac.uk/~qz280/post/index.xml

    www.statslab.cam.ac.uk/~qz280/post/index.xml
    3 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
  3. www.statslab.cam.ac.uk/~qz280/index.xml

    www.statslab.cam.ac.uk/~qz280/index.xml
    3 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
  4. www.statslab.cam.ac.uk/~qz280/tag/causal-inference/index.xml

    www.statslab.cam.ac.uk/~qz280/tag/causal-inference/index.xml
    3 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.
  5. SISCER Module 12 Causal Inference with Observational Data: Common…

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L0.pdf
    3 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;.
  6. Practical: Randomization inference

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/S1.pdf
    3 Jun 2024: would be violated if, for example,the hospital staff need some time to adjust to the new system.).
  7. SISCER Module 12 Lecture 4: Matched Case-Control Studies

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L4.pdf
    3 Jun 2024: New England Journal of Medicine,284(15):878–881. Rosenbaum, P. R. (1991). Sensitivity analysis for matched case-control studies.
  8. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 2: More on…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P2.pdf
    3 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.
  9. SISCER Module 12 Lecture 1: Randomization inference

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L1.pdf
    3 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
  10. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 6: Binomial…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P6.pdf
    3 Jun 2024: new function, do? ... Fit a new model such that the z-test for the coefficient of mumMyopicanswers this question.
  11. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 1:…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P1.pdf
    3 Jun 2024: par(new=TRUE). Experiment with other distributions and other sample sizes. Exercises.
  12. STATISTICAL MODELLING Part IIC, Michaelmas 2021 Practical 8:…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P8.pdf
    3 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
  13. PUBLICATIONS OF DOMINIC WELSH 1962 [1] J. M. Hammersley ...

    www.statslab.cam.ac.uk/~grg/papers/welsh-bib.pdf
    6 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.
  14. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 3: Linear…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P3.pdf
    3 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
  15. Confounder Selection via Iterative Graph Expansion Qingyuan Zhao…

    www.statslab.cam.ac.uk/~qz280/talk/lse-2024/slides.pdf
    3 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
  16. STATISTICAL MODELLING Part IIC, Michaelmas 2019Practical 2: More on…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P2S.pdf
    3 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 <-
  17. Using sparsity to overcome unmeasured confounding:Two examples…

    www.statslab.cam.ac.uk/~qz280/talk/mrc-bsu-2019/slides.pdf
    3 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.
  18. Small Data, Big Time—A retrospect of the first weeks of COVID-19

    www.statslab.cam.ac.uk/~qz280/talk/rss-2021/slides.pdf
    3 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.
  19. Discovering Mechanistic Heterogeneity using Mendelian Randomization

    www.statslab.cam.ac.uk/~qz280/talk/pcic-2020/slides.pdf
    3 Jun 2024: Genetic studies of body mass index yield new insightsfor obesity biology”.
  20. Confounder Selection via (Iterative) Graph Expansion Qingyuan Zhao…

    www.statslab.cam.ac.uk/~qz280/talk/pcic-2023/slides.pdf
    3 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.
  21. Multiple conditional randomization tests

    www.statslab.cam.ac.uk/~qz280/talk/ims-2022/slides.pdf
    3 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.

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