[Last Call] Learn about multicloud storage options and how to improve your company's cloud strategy. Register Now

x
Solved

# SPSS Regression Analysis

Posted on 2013-06-29
Medium Priority
493 Views
Hello Experts:

I have fundamental statistical background... currently learning my ways in SPSS.

Please see attached PDF.   Contains some statistics (i.e., running multiple regression) and graphs.

I'd like to get some assistance in interpreting the data.    From my perspective, the regression line indicates a "positive correlation" between the independent variables (I included 4 of them) and the single dependent variable.   In fact, the R^2 = 0.908... which I think is considered high/strong.

However, looking at the ANOVA and Coefficients summary table, the p-value (I think that's "Sig.") is NOT significant... that is, it is shown as 0.524.   From what I know, a significant p-value should be less than 0.05 or 0.01.

So, if I interpret the graph with regression line correctly, I would have expected the p-value to approach 0.   Again, that's not the case.

Am I mixing things up?    Given the limited amount of info included in the PDF, could someone please help better understand the data/information?

EEH
Correlation----Obtain-Better-Und.pdf
0
Question by:ExpExchHelp
[X]
###### Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

• Help others & share knowledge
• Earn cash & points

LVL 37

Accepted Solution

TommySzalapski earned 2000 total points
ID: 39288035
R^2 is a measure of how well the line fits the data (or how little error there is).
p is a measure of how likely it is that random data would produce what you see.

The reason your R^2 is high is because (as you can see) the line does really seem to fit well.
The reason your p isn't very low is because you only have 9 data points. The odds that random chance will look correlated is very high with such a small sample size. If you had a lot more data and the regression line still fit that well, you would see p be much smaller.
0

Author Comment

ID: 39288046
TommySzalapski:

Great... that explanation is exactly what I was looking for.   The information is based on a survey pilot.   The actual survey will probably result in several hundred data points.

At this time, I'm merely investigating what analysis options are out there... basically preparing the upcoming data analysis phase.

Again, thanks for the valuable feedback.

EEH
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In today's business world, data is more important than ever for informing marketing campaigns. Accessing and using data, however, may not come naturally to some creative marketing professionals. Here are four tips for adapting to wield data for insi…
What we learned in Webroot's webinar on multi-vector protection.
This Micro Tutorial demonstrates in Microsoft Excel how to consolidate your marketing data by creating an interactive charts using form controls. This creates cool drop-downs for viewers of your chart to choose from.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
###### Suggested Courses
Course of the Month13 days, 5 hours left to enroll