medium · GRE Quant
Delivery lags in a supply-chain resilience study are normally distributed with mean 72 hours and standard deviation 6 hours. Use the GRE approximation of 34% in each mean-to-one-standard-deviation band, 14% in each one-to-two band, and 2% in each tail beyond two standard deviations. Approximately which delivery lag corresponds to the 98th percentile of the distribution?
- 84 hours
- 78 hours
- 72 hours
- 66 hours
- 60 hours
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