Question 1
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet
(Links to an external site.)
standard normal table
(Links to an external site.)
t-table
(Links to an external site.)
Suppose we have independent random samples of size n1 = 520
and n2 = 450. The proportions of success in the two samples are
p1= .65 and p2 = .52. Find the 95% confidence interval for the
difference in the two population proportions.
Answer the following questions:
1. Multiple choice: Which equation would you use to solve this
problem?
A.
B.
, C.
D.
2. List the values you would insert into that equation.
3. State the final answer to the problem
Your Answer:
I would choose B
P1 = .65 P 2= .52 n1 =520 n2 = 450
.65-.52 +/- 1.96
.65
(
1
−
.65
)
+
.52
(
1
−
.52
, )
520
450
.13 +/- 1.96 (0.0315)
Intervals are .06826, .19174)
pts
You may find the following files helpful throughout the exam:
Statistics_Equation_Sheet
(Links to an external site.)
standard normal table
(Links to an external site.)
t-table
(Links to an external site.)
Suppose we have independent random samples of size n1 = 520
and n2 = 450. The proportions of success in the two samples are
p1= .65 and p2 = .52. Find the 95% confidence interval for the
difference in the two population proportions.
Answer the following questions:
1. Multiple choice: Which equation would you use to solve this
problem?
A.
B.
, C.
D.
2. List the values you would insert into that equation.
3. State the final answer to the problem
Your Answer:
I would choose B
P1 = .65 P 2= .52 n1 =520 n2 = 450
.65-.52 +/- 1.96
.65
(
1
−
.65
)
+
.52
(
1
−
.52
, )
520
450
.13 +/- 1.96 (0.0315)
Intervals are .06826, .19174)
