من سؤال الرابع حاولت افهمه واطبقه بالالة ما طلع معايا قيمة زيي ياليت توضيح اكثر
The test statistic is
Z=(p1-p2)/√(p1*(1-p1)/n1+p2*(1-p2)/n2)
=(0.6-0.75)/√(0.6*0.4/200+0.75*0.25/200)= -3.24
Given a=0.05, the critical value is Z(0.05)=-1.645 (from standard normal table)
Since Z=-3.24 is less than -1.645, we reject Ho.
So we can conclude that there is enough evidence at the 5% level of significance to support the researcher’s claim.
العرض العادي
