MATH 110 Module 6 Statistics Exam Questions and Answers- Portage Learning

MATH 110 Module 6 Statistics Exam Questions and Answers- Portage Learning.Question 1 10 / 10 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 The drug will ultimately sold to a very large number of people. So, we may assume a very large population. Since the sample size is greater than 30, we should use Case 1: Very large population and very large sample size. We are given the sample mean and sample standard deviation. So, we have n=55 x =380 s=85 ̅ We will use these values in the equation: A. For an 90% confidence level, we look at table 6.1 and find that z = 1.645. When we substitute these values into our equation, we get: