A. Use the Internet or Strayer Library to research articles on confidence interval and its application in business. Select one (1) company or organization which utilized confidence interval technique to measure its performance parameters (e.g., mean, variance, mean differences between two processes, etc.). Give your opinion as to whether or not the utilization of such a technique improves business process for the company or organization that you selected. Justify your response.

      B. Suppose the number of equipment sales and service contracts that a store sold during the last six (6) months for treadmills and exercise bikes was as follows:                        Treadmill          Exercise Bike Total sold                   185                           123 Service contracts       67                             55 The store can only sell a service contract on a new piece of equipment. Of the 185 treadmills sold, 67 included a service contract and 118 did not. Complete the following questions in the space provided below:

1. 1. Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.
   2. Is there a major difference between the two pieces of equipment? Why or why not?

Week 9 Assignments
1. D2L Online Quiz 6 – Chapters 10 & 11
The quiz is an individual assignment. Students are highly encouraged to discuss concepts from
the text with others, but then complete the quizzes individually.
The quiz has 3 short answer questions.
The quiz is timed, with 45 minutes to complete the quiz. Once the quiz is started, it CANNOT be
closed and returned to. If the quiz is closed, it will be submitted with no mark awarded for any
non-answered questions.
The quiz will be available from the first day of the term until the due date. It may be completed
at any time before its due date.
The quiz may be attempted ONCE.
Due: 11pm Friday Nov 6
Please note:
The lowest quiz mark will be dropped, and the average mark of the best 8 of the 9 quiz marks
will be used to calculate the quiz grade for the course.
Total value in the course for all quizzes is 15%
2. Online Activities
a. Individual Online Activity 4
Find Detailed Guidelines for the Individual Online Activity in the Week 9 Lesson &
Online Activities link on the D2L website.
Post your assignment to the Week 9 – Pricing Discussion Board.
Due: 5pm Wednesday Nov 4
Please note:
The lowest Individual Online Activity mark will be dropped, and the average mark of the best 5
of the 6 assignments’ marks will be used to calculate the grade for the course.
Total value in the course for all Individual online activities is 15%
b. Small Group Discussion
Find Detailed Guidelines for the Week 9 – Small Group Discussion in the Week 9 Lesson
& Online Activities link on the D2L website.
Complete the Small Group Discussion on the Week 9 – Pricing Discussion Board.
Due: 11pm Fri Nov 6

Week 9 Assignments
1. D2L Online Quiz 6 – Chapters 10 & 11
The quiz is an individual assignment. Students are highly encouraged to discuss concepts from
the text with others, but then complete the quizzes individually.
The quiz has 3 short answer questions.
The quiz is timed, with 45 minutes to complete the quiz. Once the quiz is started, it CANNOT be
closed and returned to. If the quiz is closed, it will be submitted with no mark awarded for any
non-answered questions.
The quiz will be available from the first day of the term until the due date. It may be completed
at any time before its due date.
The quiz may be attempted ONCE.
Due: 11pm Friday Nov 6
Please note:
The lowest quiz mark will be dropped, and the average mark of the best 8 of the 9 quiz marks
will be used to calculate the quiz grade for the course.
Total value in the course for all quizzes is 15%
2. Online Activities
a. Individual Online Activity 4
Find Detailed Guidelines for the Individual Online Activity in the Week 9 Lesson &
Online Activities link on the D2L website.
Post your assignment to the Week 9 – Pricing Discussion Board.
Due: 5pm Wednesday Nov 4
Please note:
The lowest Individual Online Activity mark will be dropped, and the average mark of the best 5
of the 6 assignments’ marks will be used to calculate the grade for the course.
Total value in the course for all Individual online activities is 15%
b. Small Group Discussion
Find Detailed Guidelines for the Week 9 – Small Group Discussion in the Week 9 Lesson
& Online Activities link on the D2L website.
Complete the Small Group Discussion on the Week 9 – Pricing Discussion Board.
Due: 11pm Fri Nov 6