A Brief Introduction to Biostatistics

(C. Jardin) #1

Test of significance



  • There is a less than 5% chance that a difference
    of this magnitude (0.5kg) could have occurred on
    either side of the distribution, if the random
    sample of the 100 Malay males had come from a
    population whose mean birth weight is the same
    as that of the general population


-1.96 =3.0^
n

 +1.96
n


0.475 0.475

SND=2.78

Regions of rejection
of H 0 at 5% level
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