11.2.Jl. The foJlowing table shows a portion of the results from a clinical trial investigating the effectiveness of a monoamine oxidase inhibitor as a treatment for depression (218). The relationship between y , the percentage of subjects showing improvement, and x, the patient's age, appears to be S-shaped. Grap-ti the data and superimpose a graph
of the 1east squares curve y = 1 + &+bl . Take L to be 60.
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