Hi,

Note: *Note: 

X  = 62.5

 z =  = 1 .0267 

At a = 0.01 (z = 2.576) is there enough evidence to reject the researcher’s claim

NO, 1.0267 < 2.576



________________________________________________________________________

	a	a/2	crtical regions	

80%	0.2	10%	z <-1.28155     z >+1.28155

90%	0.1	5%	z <-1.645	          z >+1.645

92%	0.8	4%	z <-1.751	          z >+1.751

95%	0.05	2.50%	z <-1.96	          z >+1.96

98%	0.02	1%	z <-2.326	          z >+2.326

99%	0.01	0.50%	z<-2.576	          z >+2.576

 

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