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I'm not sure the normal distribution allows us to make an inference as you're suggesting. I assume we're analysing defect density per code unit. For any non-uniform probability distribution, we can see that some units will be more buggy than others. For symmetric distributions like the normal distribution, exactly half of all modules will have above-average defect density! Of course, that's a consequence of assuming a constant risk of bugs across all units—but isn't that the opposite of what this question is about, that bugs breed more bugs? Maybe I misunderstood this answer.

amon
– amon

2016-11-16 18:12:20 +00:00
Commented Nov 16, 2016 at 18:12
"exactly half of..." yes, but it has no value in the current context. Sorry, I did not get understand you Amon. I don't agree with exact phrase "bugs breed more bugs". My point is that a bug found is [with probability we can't ignore] destined to be among others.

Vlad
– Vlad

2016-11-18 16:20:35 +00:00
Commented Nov 18, 2016 at 16:20

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