Question 278054
(a) 95% confidence interval for p:
n = 350				
p = 0.5571				
% = 95				
Standard Error, SE = p(1 - p)/n} = 0.0266		
z- score = 1.9600				
Width of the confidence interval = z * SE = 0.0520	
Lower Limit of the confidence interval = P - width = 0.5051
Upper Limit of the confidence interval = P + width = 0.6092
The confidence interval is [0.5051, 0.6092]
(b) Yes, we can be 95% confident that p exceeds 0.48,  since the entire 95% confidence interval lies above 0.48