statistics_Module_6_test_exam_

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.)

A new drug is introduced that is supposed to reduce fevers. Tests
are done with the drug. The drug is given to 55 people who have
fevers. It is found that the mean time that it takes for the fever to
get back to normal for this test group is 380 minutes with a
standard deviation of 85 minutes. Find the 90% confidence
interval for the mean time that the drug will take to reduce all
fevers for all people.
Answer the following questions:
1. Multiple choice: Which equation would you use to solve this
problem?




A.


B.



C.

, D.



E.

2. List the values you would insert into that equation.

3. State the final answer to the problem
Your Answer:




a)
2. n= 55 x- = 380 s= 85 . z= 1.645
380-1.645
85
55
<
μ
< 380+1.645
85
55
361.15<
μ
< 398.85