THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
n x = 360,
x = 0.69,n y = 350,
y = 0.76
-What is the lower confidence limit of the 98% confidence interval for the difference in population proportions?
A)-0.125
B)0.135
C)-0.147
D)0.147

Question

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
n x = 360,  
 x = 0.69,n y = 350,  
 y = 0.76
-What is the lower confidence limit of the 98% confidence interval for the difference in population proportions?
A)-0.125 
B)0.135 
C)-0.147 
D)0.147

Quizplus · Accepted Answer

The lower confidence limit of a confidence interval for the difference in population proportions is the lower boundary of the interval. Given the options, -0.147 is the only negative value that could represent a lower limit in a situation where the difference could be either positive or negative, indicating a decrease or a less than effect in the context of differences. Positive values would represent upper limits.