Statistics How To


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Welcome was last modified: July 27th, 2015 by Stephanie

38 thoughts on “Welcome

  1. Benedikt Björnsson

    Hi Stephanie!
    I´m studying at Agricultural Universiti of Iceland at Hvanneyri.
    This morning I payed for your book and I´m out of words about it.
    How com, it is possible to listen to lectures at an university, without getting the whole picture of a subject and by reading your explanation in few words and then all of a sudden, get the compleate picture?
    By using your words introducing your book, “students who use it never fail, and their average grade is one or two letter grades higher than other students”.
    That look logical to me, “You must be a good teacher by nature!”
    Thanks for your effort!

  2. Andale


    Thank you so much for saying this. I’m really glad it helped :)

    Good luck with your studies!


  3. Carlo

    Great blog. I had some problems dealing with normal distribution on excel and thanks to your guide I solved it easily.

  4. Anita

    I am considering buying your book, but from the pre-view it doesn’t seem to assist with interpreting results from SPSS or to assist with interpreting results from descriptive statistics in general. I am struggling with the basics (as you can see) and need to interpret results for “Business Research” as a subject not so much only statistics. Our curriculum includes quantitative- and qualitative research, although my request to you pertains quantitative interpretation.

    Will this book cover interpretation of statistics as well?

  5. Andale


    SPSS interpretation isn’t in the book…it covers the basics for an elementary stats class and most elementary stats classes don’t use SPSS. That said, you can find some SPSS articles here.

    Also, if you get stuck on something, feel free to post a comment and I’ll see if I can tackle it for an article.


  6. Giovanni Blancas

    Hi, how can I register for your forums? I don’t see register link on your site. I am trying to help my son with his science project which requires some statistical analysis. Thanks.

  7. Andale

    Hi, Giovanni,

    The board was temporarily closed to registrations. Registrations are now up: please click the “Register” button next to Login/FAQ.

    Thanks for stopping by :)

  8. Frezi


    Is elementary statistics the same as a basic college Introductory Statistics course? I’m actually using this to help with studying for Finals.


  9. Steve Hyatt

    Stephanie, I am not a math-major. 2nd, it has been 35 yrs or so since I have taken and high school or college math/algebra. No Calculus or Trig taken at all in past. My college path now requires a basic introduction to STATS and for some reason I took it online with my instructor being in California and me being in central US. Book is online as well. My problem is the book doesn’t give enough explicit detail on how to complete a statement. I will go as far as to state the book doesn’t even give a bottom line definition for a mean or what the parts are of the statement presenting a normal distribution. Here I am and in chapter 7 and next week is final time. Just by hook or crook I recalled what the “alpha” symbol is/was but did not recall how to compute anything about it. Can you help? Thank you! …..Steve

  10. el_farouq

    I came across your website and I find it interesting and understanding to be able to solve statistical problems. I have a question here on baye’s theorem.

    1- A manufacturing company employes three analytical plan for the design and development of a particular product. For cost reason, all three are made at varying time. Intact, plan 1, 2, 3 are used 30%, 20%, & 50% of the product respectively. The perfect rate for the three plans are 0.01, 0.03, 0.02 respectively. If a random product was observed and found to be defective, which plan, was must likely used and thus, responsible.

    2-Police plan to enforce speed limit by using radar trap at four different locations within city limit. The radar trap at each of the locations are 40%, 30%, 20%, and 30% of the time respectively. If a person who is speeding on his way to work has probability of 0.2, 0.1, 0.5, and 0.2 respectively, of passing this locations, what is the probability that he will receive a speeding ticket?

  11. Andale

    Hello, El Farouq,
    Unfortunately I don’t have the time to answer stats question in comments, but if you would like to post on our forum, one of our mods will be glad to help!

    P.S. Make sure you tell them what you know/have tried :)

  12. onesmus

    Can anyone give me the answer?
    What is sampling? Give a definition and then go on to describe situations that necessitate sampling to be conducted

  13. onesmus

    reply to my email: [email protected]

  14. Hanna

    Hi Stephanie,

    I’m considering buying your handbook. So far it looks helpful, however I couldn’t find the stats/List Editor under APPS. Will you have more calculator help in the handbook?

  15. Andale

    Hello, Hanna,
    I’m updating the TI89 manual with instructions on how to get the app. It’s a TI program and you can download it here:

    The e-version of the handbook comes with a TI89 guide.
    Best of luck with your course!

  16. Todd Marshall

    A table in the back of the book references this broken link. It troubles me that tables are not included in the download. Broken links like that that will make the book less valuable in time as links are moved and abandoned. Further, it means I can’t use the book absent the internet. This content should be included in the download.

    The book itself is not what I had hoped for. However, the price (one night at the honky tonk drinking beer) is worth the risk and I’m hoping there’s some useful content.

    A book that would be valuable to me would be one that decodes the myriads of notation found in math and statistics. For example, the integral sign means “find the area under a curve” for the limits given at the top and bottom of the sign. Pretty simple concept, but believe it or not I went through introductory calculus twice before I realized (it was never specifically told to me) that integration was finding an area.

    When you start talking about Hamiltonians and Hermetians things get totally out of hand.

  17. Andale

    Thanks, Todd. I will get to work fixing the broken link. In the meantime, it’s redirecting to the correct page. I can see how a book on the notation would be useful but whew…what a huge endeavor that would be! I have added a couple hundred articles to this site on definitions and I have tried to define statistics terms in plain English. I hope you find the site content to be a helpful addition to the book. Regards, S.

  18. fran

    Hi your permutation calculator is not working as it does not generate the distribution when you enter data set. Please see to it. Fran 20 Apr, 2015

    Please remove my previous comment no 27.

  19. heidi

    Hi Stephanie,

    Thanks so much for this site!! It’s helping drastically with an online stats course I’m doing!! Keep up the good work and thanks again!!

  20. Daniel Buller

    How do you find the new mean and standard deviation if your data was off by 1. Such as weight. If your mean is 180.29 and your standard deviation is 10.36 with 100 people, but no data set

  21. Salote

    Hi Stephanie thanks a bunch for this website it is of great assistance with my online course I am currently pursuing.


  22. Mohammed Adnan Suleman


    I’m currently undertaking a forecast comparison on two aircraft manufacturers and would like to know what tests would be ideal to use if i wish to compare the two together? Chi square, T test or paired T test? Look forward to hearing from you.


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