About Me


I am Muhammad Imdad Ullah. In 2017, I earned my Ph.D. degree in Statistics from Bahauddin Zakariya University Multan, Pakistan. The main concentration of my work in Ph.D. was detection and collinearity and its remedy using some biased regression techniques such as ridge regression and Liu regression. I proposed two collinearity diagnostic in my Ph.D. work and also developed three R packages that are available on CRAN. The packages are mctest, lmridge, and liureg. I also have three publications related to these packages in The R Journal.

I am also teaching applied Statistics and Mathematics as visiting lecturer in different departments of the University.

Following are the subject taught by me.

  • Statistical Packages (SPSS and Minitab)
  • Design of experiment (Practical)
  • Business Statistics (I & II)
  • Business Mathematics
  • Business Mathematics and Statistics
  • Probability and Probability distributions (Practical)
  • Advanced Statistics (Sociology, Psychology)
  • Quantitative Methods using SPSS
  • Quantitative Techniques


 Conference Papers:


  • Hina A. H., Maryam H., Imdadullah M. and Malhotra M. (2012). Role of Hopelessness and Meaning in Life among Adults. Createspace Independent Publishing platform. ISBN 978-1479187287.

24 Responses

  1. rukhsana says:

    aoa sir,
    I’m working in r software.I want to write the percentages inside the pie chart’s slices, how to write it.Plz sir reply me

    • You have to use ggplot2 package. An example related to your requirement is:

      region< -c("US","Europe","Japan","China","Others") sales<-c(25000,12000 ,10000,5000,2000) region_sales<-data.frame(region,sales) ggplot(transform(transform(region_sales, sales=sales/sum(sales)), labPos=cumsum(sales)-sales/2), aes(x="", y = sales, fill = region)) + geom_bar(width = 1, stat = "identity") + scale_fill_manual(values = c("red", "yellow","blue", "green", "cyan")) + coord_polar(theta = "y") + labs(title = "Percentage Sales per Region") + geom_text(aes(y=labPos, label=scales::percent(sales)))

  2. rukhsana says:

    great work sir

  3. Arfa says:

    Assalamo alaikum sir your website is very helpful but kindly makes some quality videos also and upload them to you tube so that we would learn every topic in depth it will be very beneficial for us. Its my humble request to you please share your worthy knowledge with all of us.
    thank you

  4. Sunil says:

    Good job done by you all data easy available this site . plz give me some advice for my statistical Exam .

  5. waseem says:

    Sir ………..you have done a good job.
    Can you help me in statistics.
    And if you wrote any sort of notes
    On statistics for intermediate.
    Plz tell me .
    I am waiting for your reply.

  6. Berls says:

    Hi Sir..
    Can you help how to fix the heteroskedasticity in my papers. I alrdy tried the transformations data & othr remedy but the heteroskedasticity is still present..
    I had use the command in stata like prais yvar xvar1…., corc or vce(robust)..stil the durbin watson test result is very slow–heretoskedasticity is present..

    Can you give any suggestions for my papers please..
    It will be appreciated. Please do response. Thank u

  7. Nouman Ashraf says:

    Awesome work and platform for the students of statistics and mathematics. Great job sir.

  8. SAMI says:

    Essalamo Alaykom. Hello,
    Please, what is the estimation method, when grouped observations in a regression model?for example the data in deciles (10 observations).
    [email protected]

  9. MURAD KHAN says:

    thnx for this usefull materials gd work……

  10. anwermuneertarar says:

    AoA … Please upload some material about T Distribution … and also Differece between about T , F , and Normal Dist MAterial

  11. Azhar Hayat says:

    nice work sir g……

  12. Anwar Muneer TArar says:

    Sir …. great work 🙂

  13. Dr. Tanu Soni says:

    It will be more beneficial if you give give explanation of the answers along with answer key. still good job and useful for a medico.

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