Updating robust reliability
Internal validity and reliability are at the core of any experimental design.
External validity is the process of examining the results and questioning whether there are any other possible causal relationships.
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The complete AFR rate over all five years is 1.68 percent — higher than the 2018 data alone, but still within a very reasonable window.
Eliminating other potential causal relationships, by using controls and duplicate samples, is the best way to ensure that your results stand up to rigorous questioning.
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Seagate’s 10TB drive family has been particularly good, with a 0.33 percent AFR for 2018, improving on the already-low 0.89 percent AFR for 2017.
For those of you wanting an AFR comparison that stretches back farther than 2016, Backblaze has provided that data as well.
This will reinforce the findings and ensure that the wider scientific community will accept the hypothesis.