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Olanike
Fluorite | Level 6

Hi All,

Please I am working on a 2 year data using the Proc mixed procedure. After the analysis (with no error in my SAS log), the P value associated with F value showed a significant difference but my mean values (after Tukey Kramer's adjustement) are not significant.

 

please how do I explain this.

 

Please find tattached the result (in excel)

1 ACCEPTED SOLUTION

Accepted Solutions
PGStats
Opal | Level 21

The way to put this is something like: "Overall F-test shows significant variation between means, but multiple testing cannot identify significantly different pairs."

PG

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4 REPLIES 4
PaigeMiller
Diamond | Level 26

Do not use MS Office files to share information, they are a security risk, and most people (including me) will not open them. Use PDF or TXT or GIF

 

The overall p value, associated with the F-test, does not have to agree with Tukey-Kramer. There is a lot of literature on the differences between multiple comparison of means procedures, perhaps you want to read up on this subject.

--
Paige Miller
Olanike
Fluorite | Level 6

Noted paige miller

PGStats
Opal | Level 21

The way to put this is something like: "Overall F-test shows significant variation between means, but multiple testing cannot identify significantly different pairs."

PG
Olanike
Fluorite | Level 6

Much appreciated PG. I will report it as you have advised.

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