ESS210B
Prof. Jin-Yi Yu
Example
qHo: m
= 50
H1: m
¹
50
If
a N=25 sampling mean has a sample mean of 45 and a sample s
of 15, then
Z = (45-50) / (15/5) = -1.67
èP(Z<-1.67)=0.0478
èp value = 2 * 0.0478 = 0.0956
qHo: m
= 50
H1: m
< 50
Z = (45-50) / (15/5) = -1.67
èP(Z<-1.67)=0.0478
èp value = 0.0478 = 0.0478