YO ? yo ? A W D I K O R F TZ ' YU w zh k ^k m o r shnshnshnshnYAFYAFYAFYAFYAFYAFYAYshYsh ?sh ?sh ?n (c (c (c (c ? XNOT to ALL male patients with hupertension attending different surgeries or in different parts of a sountru . b . Esologisal validitu refers to generalizing findings to other situations , settings or sonditions (Spiegel , 240 . Ekhamples : Drug A mau relieve asute pain due to injuru but not the tupe of pain indused bu laboratoru means . Patients...











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