Medical Term:

Poisson-Pearson formula

Pronunciation: pwah-son[h]′ pēr′sŏn

Definition: a formula to determine the statistical error in calculating the endemic index of malaria: let N = total number of children under 15 years in a locality; n = total number examined for the spleen-rate; x = number found with enlarged spleen; (x/n)100 = spleen-rate; e% = percentage of error; the percentage error will be, by this formula:

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