Thank you for your answer @FreelanceReinh . Sorry but could you kindly elaborate the parameters in your solution [rand('extrvalue',s,s/a,1/a)] as to why s/a (scale/shape), 1/a (1/shape). Would it be incorrect to just directly use the location, scale and shape parameters in the formula for example: rand ('extrvalue', location- 75000', Scale - 300000, shape- 1.3);
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