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OfflineXUL
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Statistics
    #21773064 - 06/07/15 07:32 AM (8 years, 7 months ago)

Statistics




I am starting this thread with a two way between subjects analysis of variance, which may be a little advanced to start, but I will be filling out this entire thread and posting all procedures from defining the type of data to executing t-tests.





Two Way Between Subjects Analysis of Variance (ANOVA)


I did this experiment by hand and by computer. Here it is.

He: Increased social facilitation and increased self awareness during studying will increase recall on tests.

Ho: Null







Computer tutorial:
/center>











Edited by XUL (11/19/15 08:31 PM)


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OfflinePDU
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Re: Statistics [Re: XUL]
    #21773103 - 06/07/15 08:06 AM (8 years, 7 months ago)

Great - I'll be taking intro stats next semester. Total layman - seems easier than Calc? How was your experience?


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OfflineBrian Jones
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Re: Statistics [Re: PDU]
    #21781983 - 06/09/15 07:34 AM (8 years, 7 months ago)

Mathematically, statistics is a thousand times easier than calculus. It depends though; if you take stats as a math class, which I never did,  it's going to be a lot harder than any social science version. I was a teaching assistant for 6 semesters of undergrad stats, and took 3 semesters of graduate level stats. It really doesn't go beyond high school algebra. You are only going to be asked to compute statistics by hand for two semesters at most, because after that multivariate stuff is way too time consuming.

    Understanding statistics is more conceptual. If you completely understand the definition of a sampling distribution, that's most of it right there.

    Professionals and advanced grad students are not calculating anything. You are just running programs on a statistical package like SPSS or SAS, and being able to interpret the results, and knowing the theory involved with the variables.


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InvisibleDieCommie

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Re: Statistics [Re: Brian Jones]
    #21784936 - 06/09/15 07:18 PM (8 years, 7 months ago)

Quote:

Brian Jones said:
Mathematically, statistics is a thousand times easier than calculus.




But you cannot do much statistics at all without calculus.  You need basic calculus to even start working with a distribution.  You can do most of calculus without any statistics at all.  I don't agree with this statement one bit.  There are easy calculus and statistics classes where things are cooked down for the student and little thought is required.  There are also advanced calculus and statistics classes filled with rigor and complicated theorems.  The subjects themselves are open ended...


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OfflineBrian Jones
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Re: Statistics [Re: DieCommie]
    #21794111 - 06/11/15 05:43 PM (8 years, 7 months ago)

All I'm saying is you can get PhDs in the social sciences, which require many semesters of stats and hardly go beyond high school algebra. In my third semester of grad statistics we used that famous symbol from calculus, which looked like a backwords 6 or something, but all you had to do was divide something.

    I don't know what you mean when you say "you need basic calculus to even start working with distributions." I worked with distributions for years without using calculus. I've seen advanced texts on psychometrics or econometrics that basically said all the same things as sociometrics.

    But like I said, if you take stats out of a math dept. it's a whole different ballgame. Even in intro stats when the social science students are looking for those critical values for hypothesis testing in the back of the book, the people taking intro in the math dept. are deriving those tables. I imagine the difference in complexity just keeps getting wider from them on.


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"The Rolling Stones will break up over Brian Jones' dead body"    John Lennon

I don't want no commies in my car. No Christians either.

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InvisibleDieCommie

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Re: Statistics [Re: Brian Jones]
    #21797699 - 06/12/15 02:02 PM (8 years, 7 months ago)

Quote:

  I don't know what you mean when you say "you need basic calculus to even start working with distributions." I worked with distributions for years without using calculus.




You probably had tables or programs that did the work for you.  Distributions that are continuous need calculus to be analyzed.  The CDF for example, you need to integrate to get that value.  You can do it symbolically if you are good and the distribution is well behaved, otherwise you need numerical methods.  You cannot find something as simple as a confidence interval without calculus.

Calculus is fundamental to many areas of mathematics and there is little that can be done without it.  This is why, mathematically, statistics cannot be easier than calculus.  If you are running a computer program that is something different.  Still, using SPSS to do statistics for you seems no easier than using MatLab to do calculus for you.  If using a computer program counts then I can say that calculus is easier than long division.  Because calculus is just punching buttons on MatLab but long division takes work and thought.  Thats not comparing apples to apples though. 

edit - I would amend your statement to "With respect to introductory classes, statistics class is usually easier than calculus class."


Edited by DieCommie (06/12/15 02:09 PM)


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Invisible4HO-DMT
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Re: Statistics [Re: Brian Jones]
    #21802656 - 06/13/15 02:04 PM (8 years, 7 months ago)

DieCommie is right. Fundamentally, all of statistics uses calculus. The error function is the integral of the gaussian distribution, etc. You can use statistics tools without calculus, but if you want to know what those tools are doing, you need to understand calculus.


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OfflineXUL
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Re: Statistics [Re: PDU]
    #22155934 - 08/28/15 10:46 AM (8 years, 5 months ago)

:mushroom2:


Edited by XUL (11/19/15 08:35 PM)


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InvisibleAtreyu
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Re: Statistics [Re: XUL]
    #22189602 - 09/04/15 07:05 PM (8 years, 4 months ago)

I am in Elementary Statistics this semester and came to this forum just now to get some help,
I have an exam next Wednesday that I am currently in the rough on so to speak. Most if not all
of it is entirely basic stuff that I am sure more than a few members here would have the knowledge
to help guide me through easily enough. I have the review and will be making flash cards but there
are a few things I am unfamiliar with that I would love to go through;  Anyone mind helping me out?


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Offlinejim smith
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Re: Statistics [Re: Atreyu]
    #22189639 - 09/04/15 07:10 PM (8 years, 4 months ago)

What are you unfamiliar with


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InvisibleAtreyu
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Re: Statistics [Re: jim smith]
    #22299946 - 09/27/15 06:48 PM (8 years, 4 months ago)

First question I have is: The non-vanity license plates in a state consist of Three Numbers followed by Three letters. How many such license plates are possible?

I am stuck on this ^ and have a few more to go over.

Anyone here might help?


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InvisibleAtreyu
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Re: Statistics [Re: Atreyu]
    #22299976 - 09/27/15 06:53 PM (8 years, 4 months ago)

Answer

one-thousand possible numbers (000-999), 26 letters of the alphabet the the third power.

Therefore 1000x26x26x26

=17,576,000


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OfflineXUL
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Re: Statistics [Re: Atreyu]
    #22548745 - 11/19/15 08:14 PM (8 years, 2 months ago)

I just updated the thread for a two way between subjects analysis of variance.

I will continue working on this thread. I will organize and post everything I am doing.

Feel free to critique and join along!

:hank:


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Invisible4HO-DMT
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Re: Statistics [Re: XUL]
    #22548848 - 11/19/15 08:43 PM (8 years, 2 months ago)

Quote:

XUL said:






So, does this plot show that social facilitation during studying increases test scores?


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OfflineXUL
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Re: Statistics [Re: 4HO-DMT]
    #22557164 - 11/21/15 08:06 PM (8 years, 2 months ago)

Quote:

4HO-DMT said:

So, does this plot show that social facilitation during studying increases test scores?




It looks like social facilitation (SF) may increase recall. I need to follow up with Tukey's t-tests in order to find out more about how each group's exposure to factor A differs. Tukey's t, effect size, eta squared, etc..

This data is all fictitious, which means it doesn't matter. But I am curious -- what are your conclusions about this F-test?


Edited by XUL (11/21/15 08:07 PM)


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