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