I want to include the variation within a sample when analysing the variation between samples.
Say I have sample A, B, C.
Sample A was analysed three times with the values: 2398, 2383, 2411 Sample B: 2530 Sample C: 2391
The SD of sample A is 14.0 The SD of sample A, B, C with the values 2398, 2530, 2391 is 78.3
How do I make sense of this? At what threshold value can I determine if a sample differ from one another? How do I include the variation within a sample when calculating the variation between samples?