=== Fit and bias studies ===
  - Try to rewrite all the files that are necessary to run the bias study with the combine tool. README is here https://github.com/CMSDIJET/DijetRootTreeAnalyzer/blob/master/README_caloscouting_analysis.md, but it is not very informative, so I need to dig through code to understand better the framework.
  - I found the best bkg function: {{ :users:danyyl:dijet:fit_mjj_full_calotrijet2016_3.pdf |}} - it the 6 parametric functions that was used by atlas and ua2 collaboration to fit the dijet mass spectrum.
  - The script RunBias.py executes all the commands that are needed for the bias study:
    - First command: writes the data card need to run combine tool in the following steps using the data file (prepared), nominal signal file (prepared), signal files with systematic uncertainties (prepared).
    - Second command: generates N pseudo experiments using as input:
      - the output data card from the first step
      - the function to generate toys
      - parameters from the dijet mass spectrum fit using the same function as for the generation
      - user-defined signal strength
    - Third command: fit using the combine tool with the maximum likelihood method all of the toys using user-defined function and compute signal strength from the fit.