Annual flood records for a 10-year period are given by:
Year | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Flood | 300 | 700 | 200 | 400 | 1000 | 900 | 800 | 500 | 100 | 600 |
Mean = 550 cfs, median = 550 cfs, standard deviation = 300 cfs. Use an annual series and the definition of frequency in a frequency analysis to determine the magnitude of the 4-year flood. Compare this historical value with the analytical 4-year flood obtained by assuming floods follow a normal distribution.
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