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  2. Quasi-experiment - Wikipedia

    en.wikipedia.org/wiki/Quasi-experiment

    The quasi-independent variable is the variable that is manipulated in order to affect a dependent variable. It is generally a grouping variable with different levels. Grouping means two or more groups, such as two groups receiving alternative treatments, or a treatment group and a no-treatment group (which may be given a placebo – placebos ...

  3. Design of experiments - Wikipedia

    en.wikipedia.org/wiki/Design_of_experiments

    In some cases, independent variables cannot be manipulated, for example when testing the difference between two groups who have a different disease, or testing the difference between genders (obviously variables that would be hard or unethical to assign participants to). In these cases, a quasi-experimental design may be used.

  4. Quasivariety - Wikipedia

    en.wikipedia.org/wiki/Quasivariety

    Every variety is a quasivariety by virtue of an equation being a quasi-identity for which n = 0. The cancellative semigroups form a quasivariety. Let K be a quasivariety. Then the class of orderable algebras from K forms a quasivariety, since the preservation-of-order axioms are Horn clauses. [2]

  5. Quasiconvex function - Wikipedia

    en.wikipedia.org/wiki/Quasiconvex_function

    For a function of a single variable, along any stretch of the curve the highest point is one of the endpoints. The negative of a quasiconvex function is said to be quasiconcave. Quasiconvexity is a more general property than convexity in that all convex functions are also quasiconvex, but not all quasiconvex functions are convex.

  6. Repeated measures design - Wikipedia

    en.wikipedia.org/wiki/Repeated_measures_design

    The independent variable is the time (Levels: Time 1, Time 2, Time 3, Time 4) that someone took the measure, and the dependent variable is the happiness measure score. Example participant happiness scores are provided for 3 participants for each time or level of the independent variable.

  7. Hegseth’s name has been submitted for FBI background check ...

    www.aol.com/news/hegseth-name-submitted-fbi...

    Pete Hegseth’s name has been submitted to the FBI for a background check, his attorney told CNN Thursday, as some lawmakers call for more vetting of President-elect Donald Trump’s pick to run ...

  8. Difference in differences - Wikipedia

    en.wikipedia.org/wiki/Difference_in_differences

    Difference in differences (DID [1] or DD [2]) is a statistical technique used in econometrics and quantitative research in the social sciences that attempts to mimic an experimental research design using observational study data, by studying the differential effect of a treatment on a 'treatment group' versus a 'control group' in a natural experiment. [3]

  9. Why to avoid cleaning, laundry on New Year's - AOL

    www.aol.com/why-avoid-cleaning-laundry-years...

    If you want good luck in the new year, superstition says to skip the cleaning and laundry.