MATH110 MODULE 8 EXAM | MATH 110 MODULE 8EXAM
QUESTIONS AND ANSWERS- PORTAGE LEARNING
Suppose we have independent random samples of size n1 = 420 and n2 = 510. The proportions of
success in thetwo samples are p1= .38 and p2 = .43. Find the 99% confidence interval for the difference
in the two populationproportions.
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
From table 6.1, we see that 99% confidence corresponds to z=2.58. Notice that the sample sizes
are each greater than 30, so we may use eqn. 8.2:
, Answer: B.
So, the interval is (.-0.1333, -0.03326).
QUESTIONS AND ANSWERS- PORTAGE LEARNING
Suppose we have independent random samples of size n1 = 420 and n2 = 510. The proportions of
success in thetwo samples are p1= .38 and p2 = .43. Find the 99% confidence interval for the difference
in the two populationproportions.
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
From table 6.1, we see that 99% confidence corresponds to z=2.58. Notice that the sample sizes
are each greater than 30, so we may use eqn. 8.2:
, Answer: B.
So, the interval is (.-0.1333, -0.03326).
