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Statistics course and homework discussion. Elementary statistics.enTue, 22 Aug 2017 01:30:48 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Statistics
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Sample Size Calculation
http://www.talkstats.com/showthread.php/70035-Sample-Size-Calculation?goto=newpost
Mon, 21 Aug 2017 17:30:32 GMTHi,
New to the stats so apologies in advance. Is it possible to use a sample size calculation to find the delta to determine if values from...Hi,

New to the stats so apologies in advance. Is it possible to use a sample size calculation to find the delta to determine if values from categorical data is different?

Tim
]]>StatisticsTim_1http://www.talkstats.com/showthread.php/70035-Sample-Size-CalculationExplaining Variation in the Simple Linear Regression Model
http://www.talkstats.com/showthread.php/70034-Explaining-Variation-in-the-Simple-Linear-Regression-Model?goto=newpost
Mon, 21 Aug 2017 10:32:20 GMTFor one data point, how can the variation explained by the regression line exceed the total variation?
Here the blue line represents the mean of...For one data point, how can the variation explained by the regression line exceed the total variation?

Here the blue line represents the mean of the response variable. I drew 2 data points. For Y1, the total variation is broken down into the variation explained by the regression line, and variation not explained by the line (error).

But say in the model you had the point Y2 as shown. You can see the total variation from Y2 to the blue line. How can the variation explained by the regression for Y2 exceed the total variation from Y2 to Ybar?

My textbook says that the total variation can be broken down into variation explained by the line, and variation not explained by the line. But as I mentioned above for data point Y2, it does not make sense because SSR is greater than the total variation. To me it is like saying I have a total of 10 eggs but really have 15 eggs. Like you are just adding variation out of nowhere.

]]>StatisticsStilloftheNighthttp://www.talkstats.com/showthread.php/70034-Explaining-Variation-in-the-Simple-Linear-Regression-Modelspss and likert scale
http://www.talkstats.com/showthread.php/70033-spss-and-likert-scale?goto=newpost
Sun, 20 Aug 2017 20:42:01 GMTHi,wondering if you can help.
I am using a likert scale which does not give much information as
to how to analyse the score. In theory, the...Hi,wondering if you can help.

I am using a likert scale which does not give much information as
to how to analyse the score. In theory, the minimum and maximum range are 16-112.
High scores shows stress.
My test results range is between 16-81(47 participants) and I need
to work out a way to calculate what scores point to high/low levels of stress as there is no particular cut-off point.
I am using spss and would like a way to work it out on spss. If the minimum score was 0, i would have known how to do it but in this case, I am completely stuck!
]]>Statisticsp160http://www.talkstats.com/showthread.php/70033-spss-and-likert-scale