topic Re: Statistics in Statistical Procedures

Interpret statistics from PROC GLM

SidKh — Tue, 29 May 2018 17:59:13 GMT

Hi all,

I am trying to understand the following question,

Customers were surveyed to assess their intent to purchase a product. An analyst divided the customers into groups defined by the company's pre-assigned market segments and tested for difference in the customers' average intent to purchase.

The following is the output from the GLM procedure:

source DF Sum of square Mean Square F value Pr>F

Model 7 15716.87902 2245.268 64.98 <.0001

Error 146 5044.56 34.5518

Corrected- 153 20761.44481

total

What percentage of customers' intent to purchase is explained by market segment?

Can someone explain this?

Thanks

Re: Statistics

PGStats — Sun, 27 May 2018 04:38:04 GMT

Hint: Look up the definition of R-Square in a Statistics textbook.

Re: Statistics

SidKh — Sun, 27 May 2018 05:08:01 GMT

Thanks for the hint...

R-sq= 1- SS error/SS total = 1 - 5044.5657/20761.4448 =0.76= 76%

Re: Statistics

Ksharp — Sun, 27 May 2018 10:45:08 GMT

15716.87902 / 20761.44481=0.757