Case studies in Applied Biostatistics

Please read the cases below and answer all questions. Answers should be contextualized to suit the case together with an appropriate interpretation of the results.

Researchers wish to know if the data they have collected provide sufficient evidence to indicate a difference in mean serum uric acid levels between normal individuals and indi- viduals with Down's syndrome. The data consist of serum uric acid readings on 12 indi- viduals with Down's syndrome and 15 normal individuals. The means are x = 4.5 mg/100 ml and x2 = 3.4 mg/100 ml