17 Compute r and var(r) over Time time (hours) Sample SizeFailures Cum FailuresReliabilityVariance 1200010 2 0010 3 0010 4 110.950.0025 520010.950.0025 620010.950.0025 720120.90.0047 820130.850.0067 920250.750.0099 1020160.70.0111
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