Variation between different ube and same tube

[Cornelis]

Dear all,

A fine colleague has measured a sample by colour.

Tube	Colour
1	1.4
1	1.3
1	1.4
2	1.1
2	1.0
2	1.1
3	1.1
3	1.1
3	1.0

He measured a sample i n a tube three times.

Themn he poursed teh same sample in onther tube 2 and 3 and measured again 3 times each.

My question:

Is there a SAS procedure that can calculate

a) variation of colour measurements from the same tube

b) from different tube and

c) compare variations between a) and b) is there a significant difference.

Hope that you can provide me an example

Best regards,

Cornelis

[PeterClemmensen · Accepted solution]

data have;
input Tube$ Colour;
datalines; 
1 1.4
1 1.3
1 1.4
2 1.1
2 1.0
2 1.1
3 1.1
3 1.1
3 1.0
;

ods graphics on;
proc anova data = have;
	class tube;
	model colour = tube;
run;
ods graphics off;

[Cornelis]

Thank you fo your contribution. You are right, PROC ANOVA is the most simple solution to handle this data set.

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