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Author: search.filters.author.Surendran, P U

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    Prediction of weekly rainfall of a place
    (Kerala Agricultural University, 1977) Surendran, P U; Sunny, K L; Prabhakaran, P V
    New methods for estimating the weekly rainfall of a place has been developed h this pap?r. The California and Hazen's methods found in Patro et nl have been shown to be their special cases. It has further been pointed out that i h " method, of which Hazen's is a special case, is rationally more appropriate than the other though all of thsm are linearly related- A new but exquisite criterion for determining the adequacy of the data has also been established.
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    Estimation of parameters under random determinations on each unit of a random sample
    (Kerala Agricultural University, 1979) Indiradevi, A; Surendran, P U
    When there are several determinations per unit of a sample and j, the number of determinations is a random variable, the mean of the means per unit can be taken to be an unbiased estimate of the population mean. The variance of the estimate and the estimate of this variance is derived under general conditions. Since the expressions involve E(1/j) in particular situations where E (1/j) may be calculated and tabled, they may be evaluated with the he!p of the tables given. These results may also be extended to other situations suitably.
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    Comparison of two methods for the study of permanent manurial trials
    (Kerala Agricultural University, 1982) Krishnan, S; Surendran, P U; Gangadhara Menon, P K
    A rigorous justification for the comparison of treatments by the stability approach initated by Finlay and Wilkinson (1963) has been attempted. The data on Jaya variety of rice were analysed both by the method of stability co-efficients as also by the method of analysis of groups of experiments. The results obtained by the above two methods revealed that they are equalent.