Don't use plagiarized sources. Get Your Custom Essay on

Mg 620 research and statistics for managers april 2016 final exam

Just from $13/Page

MG 620 Research and statistics for Managers April 2016

**Final Exam ****Instructions: **Answer all questions ** **

** **

**Part I : Problem**

** **

**1. ****Fitting a straight line to a set of data yields the following prediction line:**

Y = 10 + 4X

i) Interpret the meaning of the Y intercept, b_{0}.

ii) Interpret the meaning of the slope, b_{1}

_{ }

iii) Predict the mean value of Y for X =8

**2. ****College administrators are interested in determining if the number of hours students study affects the GPA of students. They sample 6 students and determine the number of hours of studied last month and** **their GPA. These data are presented in the table that follows.**

Student Hours Study(X) GPA (Y)

1 1 4

2 2 6

3 1 3

4 0 1

5 1 1

6 2 5

- Construct a scatter diagram for these data. Does the scatter diagram show a linear relationship between sales and number of new clients?
**Explain and show all work!**

** **

**Y**

6

5

4

3

2

1

0 1 2 3 X** **

b) Estimate the **intercept **(b_{0}). Show your work

c) Estimate the **slope** (b_{1}). Show your work

c) **Draw the regression line**

3. If SSR = 75 and SST = 88, compute the coefficient of determination, **r ^{2}**, and interpret its meaning.

4. **A Professor at a Community College does not want its students to wait in line for service for too long. She estimated that the students currently have to wait an average of 4 minutes for service. Assume that the waiting times for all customers at this branch have a normal distribution with a mean of 8 minutes and a standard deviation of 2 minutes**.

Find the probability that randomly selected customer will have to wait for less than 4 minutes?

Instructions: Show all steps:

1. Draw the normal curve and indicate the mean, standard deviation, and the X bar scale

2. Identify the area of interest (that is shade the area under the curve that you will compute the probability).

3. Covert the X bar values in Z scores

4. Look up the Z standardized table for the cumulative area(s).

5. Now, make your decision ( that a customer will wait for less than 4 minutes)

1. **A Professor at a Community College does not want its students to wait in line for service for too long. She estimated that the students currently have to wait an average of 4 minutes for service. Assume that the waiting times for all customers at this branch have a normal distribution with a mean of 8 minutes and a standard deviation of 2 minutes**.

What is the probability that customers have to wait for 2 to 8 minutes?

Instructions: Show all steps:

a. Draw the normal curve and indicate the mean, standard deviation, and the X bar scale

b. Identify the area of interest (that is shade the area under the curve that you will compute the probability).

c. Covert the X bar values in Z scores

d. Look up the Z standardized table for the cumulative area(s).

e. Now, make your decision ( that a customer will have to wait for 2 to 8 minutes)

** **

**10. ****One thousand teachers were selected from a city’s large private college, and they were asked whether or not they have health coverage provided by their college. Below is the two-way contingency table showing health care coverage.**

Have Health Coverage

**Yes No** Total

Men 450 150 600

**Women ** 300 100 400

Total 750 250 1000

Suppose a someone is selected at random from these 1000 teachers,

a) Find the probability that this person is a woman

b) What is the probability that a person selected is a woman and has health coverage

c) What is the probability that a teacher has health coverage given that the teacher is a man

d) What is the probability the teacher is a woman given that she does not have health coverage

**11. ****A Motel owner wishes to sell his apartment. He claims that over the past 8 months, the average daily rent revenue was $200 with a standard deviation of $25. A sample of 30 days reveals daily revenue of $150. **

** **

** **

If you use the significance level of α = .05, would you reject the null hypothesis? Show all steps!

**Instructions:**

1. State the Hypothesis( Null and Alternative)

2. Draw the normal distribution and identify the acceptance and rejection regions

3. Compute the Z _{STAT} value

4. Compare your Z_{STAT }with the Z Tabled value.

5. Make you decision

** **

** **

** **

Basic features

- Free title page and bibliography
- Unlimited revisions
- Plagiarism-free guarantee
- Money-back guarantee
- 24/7 support

On-demand options

- Writer’s samples
- Part-by-part delivery
- Overnight delivery
- Copies of used sources
- Expert Proofreading

Paper format

- 275 words per page
- 12 pt Arial/Times New Roman
- Double line spacing
- Any citation style (APA, MLA, Chicago/Turabian, Harvard)

At 111papers.com, we value all our customers, and for that, always strive to ensure that we deliver the best top-quality content that we can. All the processes, from writing, formatting, editing, and submission is 100% original and detail-oriented. With us, you are, therefore, always guaranteed quality work by certified and experienced writing professionals. We take pride in the university homework help services that we provide our customers.

As the best homework help service in the world, 111 Papers ensures that all customers are completely satisfied with the finished product before disbursing payment. You are not obligated to pay for the final product if you aren’t 100% satisfied with the paper. We also provide a money-back guarantee if you don’t feel that your paper was written to your satisfaction. This guarantee is totally transparent and follows all the terms and conditions set by the company.

Read moreAll products that we deliver are guaranteed to be 100% original. We check for unoriginality on all orders delivered by our writers using the most advanced anti-plagiarism programs in the market. We, therefore, guarantee that all products that we submit to you are 100% original. We have a zero-tolerance policy for copied content. Thanks to our strict no plagiarized work rule, you can submit your homework to your professor without worrying.

Read moreTThis is one of the most cherished courtesy services that we provide to help ensure that our customers are completely satisfied with our finished products. Delivering the best final product to our customers takes multiple inputs. 111papers.com prides itself on delivering the best university homework help services in the writing industry. And, in part, our free revision policy is how we do it. What’s more, all our revisions are 100% free without any strings attached.

Read moreClient privacy is important to use. We know and understand just how important customers value their privacy and always want to safeguard their personal information. Thus, all the information that you share with us will always remain in safe custody. We will never disclose your personal information to any third party or sell your details to anyone. 111 Papers uses the most sophisticated, top-of-the-line security programs to ensure that our customers’ information is safe and secured.

Read morePlacing your order with us means that you agree with the homework help service we provide. We, in turn, will endear to ensure that we do everything we can to deliver the most comprehensive finished product as per your requirements. We will also count on your cooperation to help us deliver on this mandate. Yes, we also need you to ensure that you have the highest-quality paper.

Read more
The price is based on these factors:

Academic level

Number of pages

Urgency