Psoriasis is a skin disorder with no known cure and no proven effective pharmaco

Question

Psoriasis is a skin disorder with no known cure and no proven effective pharmacological treatment. An alternative treatment for psoriasis is ichthyotherapy. Fish from the hot pools of Kangal, Turkey, feed on the skin scales of bathers, reportedly reducing the symptoms of psoriasis. In one study, 67 patients diagnosed with psoriasis underwent three weeks of ichthyotherapy. The Psoriasis Area Severity Index (PAS) of each patient was measured both before and after treatment. (The lower the PASl score, the better is the skin condition.) Complete parts a through c. Click the icon to view the box plots of the PASI scores, both before (baseline) and after three weeks of ichthyotherapy treatment. a. Find the approximate 25th percentile for the PASI scores before treatment The approximate 25th percentile is

Explanation / Answer

from above given box plot aprroximate 25th percentile for the PASI score before the treatement =20

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