medium · GRE Quant
For repair costs in a fleet-maintenance audit, values are normally distributed with mean 500 and standard deviation 20. Use the approximation that each mean-to-one-standard-deviation band contains 34%, each one-to-two-standard-deviation band contains 14%, and each tail beyond two standard deviations contains 2%. Approximately what percent of the values are from 460 through 480?
- 28%
- 16%
- 2%
- 34%
- 14%
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