Estimate the mean, variance, standard deviation, and skew of 18-year precipitation data on a small basin given
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Estimate the mean, variance, standard deviation, and skew of 18-year precipitation data on a small basin given in Table 10.1 .
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TABLE 10.1 Computations of Moments of June Precipitation Year Precipitation x (cm) (x-x) (x-x) (x-x) 1954 4.27 0.486 0.236 0.1145 1955 2.92 -0.864 0.747 -0.6460 1956 2.00 -1.784 3.184 -5.6821 1957 3.34 -0.444 0.198 -0.0878 1958 2.32 -1.464 2.145 -3.1406 1959 2.89 -0.894 0.800 -0.7156 1960 2.79 -0.994 0.989 -0.9834 1961 5.52 1.736 3.012 5.2278 1962 4.09 0.306 0.093 0.0285 1963 9.86 6.076 36.912 224.2632 1964 3.90 0.116 0.013 0.0015 1965 6.85 3.066 9.398 28.8090 1966 2.33 -1.454 2.115 -3.0767 1967 4.16 0.376 0.141 0.0530 1968 2.10 -1.684 2.837 -4.7794 1969 0.85 -2.934 8.611 -25.2684 1970 5.00 1.216 1.478 1.7961 1971 2.93 -0.854 0.730 -0.6238 Sum 68.12 0.008 73.639 215.2898
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