A Brief Introduction to Biostatistics

(C. Jardin) #1

Test of significance



  • Where does our sample mean of 3.5kg lie on the
    sampling distribution?

  • If it lies outside the limit of 1.96 , the
    likelihood that the sample belongs to the same
    population is equal or less than 0.05 (5%)


n


-1.96 =3.0^
n

 +1.96
n


0.475 0.475
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