Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between twopopulation proportions. Assume that independent simple random samples have been selected from the two populations.
-A state university found that it retained 25 students out of 352 in 2003 and 26 students out of 334 in 2004. Construct a 90% confidence interval for the difference in the proportions of students retained
In 2003 and 2004.
A)-0.0585 to 0.0449
B)-0.0535 to 0.0398
C)-0.0398 to 0.0262
D)-0.0461 to 0.0325

Question

Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between twopopulation proportions. Assume that independent simple random samples have been selected from the two populations.
-A state university found that it retained 25 students out of 352 in 2003 and 26 students out of 334 in 2004. Construct a 90% confidence interval for the difference in the proportions of students retained
In 2003 and 2004. 
A)-0.0585 to 0.0449
B)-0.0535 to 0.0398
C)-0.0398 to 0.0262
D)-0.0461 to 0.0325

Quizplus · Accepted Answer

The Answer of Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between twopopulation proportions. Assume that independent simple random samples have been selected from the two populations.
-A state university found that it retained 25 students out of 352 in 2003 and 26 students out of 334 in 2004. Construct a 90% confidence interval for the difference in the proportions of students retained
In 2003 and 2004. 
A)-0.0585 to 0.0449
B)-0.0535 to 0.0398
C)-0.0398 to 0.0262
D)-0.0461 to 0.0325

Use the Two-Proportions Z-Interval Procedure to Obtain the Required Confidence