MATH 225N Basic Statistics Data Used in Everyday Life

MATH 225N Basic Statistics Data Used in Everyday Life

MATH 225N Basic Statistics Data Used in Everyday Life

We explore Descriptive Statistics and the fundamentals of sampling techniques and quantitative research and research design this Week. This includes data, experimental design, so-called descriptive statistics, distributions, graphs and graphical displays, and measures of central tendency, variation, and position. At a somewhat basic and introductory level, we sometimes try to describe distributions using concepts of “shape, center, and spread.” Central tendency refers to “center” and variation refers to “spread.”

Please don’t forget to use an “outside” resource as part of the content and documentation for your first Post – the Post which is due on or before Wednesday of the Week – the Post where you make the most major contribution to the Weekly discussion posting area and attempt to address the discussion prompts / cues for the Week.  It could possibly include a web site that you discovered on the internet at large, so long as the web site is relevant and substantial and does not violate the Chamberlain University policy for prohibited web sites, and so forth.  It could possibly include references / resources that you discover through making use of the online Chamberlain University Library ( please click Resources along the left and then click Library to discover the link to the Chamberlain University online Library ) .    🙂


Please check out the link below to see some of the key similarities and key differences between Bar Plots / Graphs / Charts and Histograms.


Link (Links to an external site.)Links to an external site.


This is one kind of an example of using an “outside” source / resource to add to what is revealed in our Weekly Lesson in Modules and in our Weekly text book reading.


Please don’t forget to look over the Graded Discussion Posting Rubric each Week to be certain that you are meeting all of the Frequency requirements as well as all of the Quality requirements for graded discussion posting each Week.


If you have any questions about anything, please do not hesitate to post in the Q & A Forum discussion posting area or to send me a direct e-mail message to

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Thanks Friends and Good Luck !  Work hard and learn a lot !!


Sincerely,  Mr. Smith     Chamberlain University     Math, Statistics, and Quantitative Research

I would say that in an introductory course at this level that we briefly look at 6 methods of data collection and that among researchers and scholars 5 of them are considered to be sampling techniques but I think it is appropriate to mention the 6th method of data collection in this same breath anyway.


In our online text book on pages 16-17 the authors discuss simple random sampling, stratified sampling, cluster sampling, systematic sampling, and convenience sampling.


Convenience sampling is bar far the weakest of all these methods and leads to the greatest potential and

MATH 225N Basic Statistics Data Used in Everyday Life
MATH 225N Basic Statistics Data Used in Everyday Life

opportunities for various forms of statistical bias in the resulting sample.  So in real life practice, convenience sampling should be avoided at all costs, and simple random sampling is often thought of as a bit of a “gold standard” in statistics and quantitative research.  But I can see or visualize in real life practice why once in a while that stratified sampling might be a pretty good idea and approach, so to speak, for example.


The 6th form of data collection that I want to mention here is a census.  The reason that a census is different from the 5 types of sampling mentioned above is that a census literally is “everyone” while the other 5 forms of data collection above definitely involve “less than everyone.”


Please see the following slides to see some pictures of some of these sampling techniques.


Please feel free to look around in the online text book and on the internet at large to see info about what a census is and to Post about it in one of your Week One Posts.


Thanks Friends and Best Wishes !!






Holmes, A., Illowsky, B., & Dean, S.  ( 2018 ).  Introductory business statistics.  OpenStax.

Sometimes when Folks talk about “research methods” part of what they are talking about is “the organization of the study.”  But there is much more to it than that and the “organization of the study” “issue” is not addressed much in the slides that follow here but it is addressed a little bit.  As you go on to take additional and more advanced and more detailed courses in quantitative research and data analysis and statistics and probability, knowing and understanding “the organization of the study” will become more and more important to you being able to understand and follow the types of things that you will be studying and learning about in those future courses.


So in this course you are not held very accountable for what is on many of the slides that follow here, but on the other hand understanding some of what is on the slides that follow here will help your overall understanding and comfort and confidence during this course here.


For example in this course here, it is very important to understand the difference between a sample and a population.  It is also very important to understand the difference between a statistic and a parameter.


Thanks Friends and the slides that follow here should give you a reasonable basis and foundation for approaching the upcoming Weeks 2-8 of the course.


Thanks and Best Wishes Friends !!



I was looking around on the attached APA seventh edition sample paper here and as far as I can tell when we use the online text book as a source the item entry in the References list at the end of the Post would look like:


Holmes, A., Illowsky, B., & Dean, S.  ( 2018 ).  Introductory business statistics.  OpenStax.


The reason I used the year 2018 as the year of publication was that I have an actual physical copy of the textbook and inside the front cover it showed 2018 as the year of publication.


However, depending on where class members find the text book or what version that they use, I have seen class members put 2017, 2019, or 2020 for the year of publication too.      😉


However the in-text citations for this source look quite a bit different from this.


For an in-text citation at the beginning of a sentence – this would look like:


Holmes et al. ( 2018 ) blah blah blah


But at the end of a sentence the in-text citation would look like:


blah blah blah ( Holmes et al., 2018 ).


These examples of in-text citations here are all for paraphrases.


Direct quotes require an extra piece of information, the page number( s ) where the direct quote was taken from, if page numbers are available.


The attachment here does have one or more concrete examples of an in-text citation for a direct quote where page number( s ) was / were available.


Thanks Everyone !!



student-annotated APA seventh edition sample paper-2.pdf