Symbol n
n is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Read this term in its guide →Published equation contexts
Why this formula appears here
State the sample size the claim actually requires. If a system is being represented as safe at a given tail probability, report the number of trials run and compare it explicitly against the n k/ threshold needed to have observed the claimed rate with any precision, rather than letting a comfortable-sounding trial count stand in for a rate that would in fact require orders of magnitude more observations.
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Symbol k
k is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Read this term in its guide →Symbol q_τ
q_τ is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Read this term in its guide →How to interpret it
Its accuracy depends on the assumptions and range of use described in the article.
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Published contexts (1)
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Equation 29 · Model Evaluation
Why Average Success Rate Hides the Failures That Matter Most
This equation gives an approximation: it relates the quantities while allowing an approximation.
State the sample size the claim actually requires. If a system is being represented as safe at a given tail probability, report the number of trials run and compare it explicitly against the n k/ threshold needed to have observed the claimed rate with any precision, rather than letting a comfortable-sounding trial count stand in for a rate that would in fact require orders of magnitude more observations.
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