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Relationship between the age of a meadow and the number of R. repens flowers from a random sample of 100 with more than five petals. The continuous line is the linear regression, with the equation given; the dashed line is the logistic regression of the form: age = 1/0·013[ln(p/1 – p) + 3·092] (P < 0·001 with both logistic and linear regression).
