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Re:Backblaze Hard Drive Stats for 2018 by Sahhaese on Tuesday January 22, 2019 @12:33PM (#18970208)
With two categories A and B you don't need the same number in each category to compare whether they come from the same distribution.

I would be surprised if the number of drives they have is actually "statistically insignificant" \* but I haven't crunched the numbers.

https://en.wikipedia.org/wiki/Pearson%27s_chi-squared_test

\* By this I guess you mean that the null hypothesis of "they have the same failure rate" is not rejected.

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