07 Jan A quality lab will
Discussions
WEEK 1: DESCRIPTIVE STATISTICS
3030 unread replies.126126 replies.
If you were given a large data set (i.e., sales over the last year of our top 100 customers), what might you be able to do with these data? What might be the benefits of describing the data?
WEEK 2: REGRESSION
9797 unread replies.138138 replies.
Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information that you have. Your boss has asked you to put together a report showing the relationship between these two variables. What could you present and why?
WEEK 3: PROBABILITY AND ODDS
6262 unread replies.139139 replies.
The odds of winning a game are given as 1:25. What is the probability that you will win this game? What is the probability that you will lose this game? In your follow-up replies, consider which number in the odds ratio needs to change and how it needs to change in order to increase the probability of winning. (Note: See page 145 in the text for a discussion on odds.)
WEEK 4: DISCRETE PROBABILITY VARIABLES
4545 unread replies.126126 replies.
Provide an example that follows either the binomial or Poisson distribution, and explain why that example follows that particular distribution. In your responses to other students, make up numbers for the example provided by that other student, and ask a related probability question. Then, show the work (or describe the technology steps), and solve that probability example.
WEEK 5: INTERPRETING NORMAL DISTRIBUTIONS
3737 unread replies.130130 replies.
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
WEEK 6: CONFIDENCE INTERVAL CONCEPTS
7474 unread replies.140140 replies.
Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you
1. increase the confidence level,
2. increase the sample size, or
3. increase the margin of error? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula.
WEEK 7: REJECTION REGION
116116 unread replies.137137 replies.
How is the rejection region defined, and how is that related to the p value? When do you reject or fail to reject the null hypothesis? Why do you think statisticians are asked to complete hypothesis testing? Can you think of examples in courts, in medicine, or in your area?
MATH399 Week 2 Lab Latest 2017 August
WEEK 2: LAB OVERVIEW
Table of Contents
Lab Overview
Scenario/Summary
Click to download the Week 2 Lab Document (Links to an external site.)Links to an external site. to complete the lab for this week. All of the directions are included in the document.
For use with the lab and throughout the course, click to download Excel: A How-To Handout (Links to an external site.)Links to an external site..
After some introductory comments, the first question begins under the title Creating Graphs and is a pie chart.
The data for this lab is located in the Files section of the Course Menu. If you are not able to locate the data file, please contact your professor.
On the last page is a section is titled Code Sheet. It is only there to explain what the variables in the data set represent. In other words, the code sheet just lists the variable name and the question used by the researchers on the survey instrument that produced the data that are included in the Excel data file. Those are not questions for you to answer, just information.
The document includes places where you need to input the answers. Any place where you see a gray box is where you need to put an answer.
Deliverables
Fill in the document, save it with your name in the title, and submit the document.
Below is the grading rubric for this assignment.
Category
Points
%
Description
Questions 1–3
15
30%
Creating graphs and charts
Question 4
5
10%
Calculating means and standard deviations
Questions 5–10
30
60%
Interpreting and using data
Total
50
100%
A quality lab will meet or exceed all of the above requirements.
Required Software
Microsoft Office: Word and Excel
Use a personal copy*, or access the software** at https://lab.devry.edu (Links to an external site.)Links to an external site..
*From the Course Resources page, students can obtain a personal copy of Microsoft Office through the Student Software Store.
**To learn more about using the virtual lab environment, click the Lab button on the Course Resources page and select Citrix.
Lab Steps
Prepare and Submit Lab
1. Open Excel.
2. Open the lab Word document.
3. Follow the steps in the lab Word document to do calculations in Excel.
4. Copy and paste from Excel into the Word document, or retype the answer. Complete the answers to the questions in complete sentences (fill in each gray box in the Word document).
5. Save the lab Word document, and submit it. No other files should be submitted.
MATH399 Week 4 Lab Latest 2017 August
WEEK 4: LAB OVERVIEW
Lab Overview
Scenario/Summary
Open the Week 4 Lab Document (Links to an external site.)Links to an external site.. All of the directions are included in the document.
The data for this lab are available from your instructor. They are the same data that were used in the Week 2 Lab.
The document includes places where you need to input the answers. Any place where you see a gray box is where you need to put an answer.
Deliverables
Fill in the document, save it with your name in the title, and submit the document.
Below is the grading rubric for this assignment.
Category
Points
%
Description
Question 1
12
24%
Three graphs
Question 2
4
8%
Mean and standard deviation
Questions 3 and 4
22
44%
Probabilities
Questions 5–7
12
24%
Calculations and interpretations
Total
50
100%
A quality lab will meet or exceed all of the above requirements.
Required Software
Microsoft Office: Word and Excel
Use a personal copy, or access the software at https://lab.devry.edu (Links to an external site.)Links to an external site..
Lab Steps
Prepare and Submit Lab
1. Open Excel.
2. Open the lab Word document.
3. Follow the steps in the lab Word document to do calculations in Excel.
4. Copy and paste from Excel into the Word document, or retype the answer. Complete the answers to the questions in complete sentences (fill in each gray box in the Word document).
5. Save the lab Word document, and submit it. No other files should be submitted.
MATH399 Week 6 Lab Latest 2017 August
WEEK 6: LAB OVERVIEW
Table of Contents
Lab Overview
Scenario/Summary
Open the Week 6 Lab Document (Links to an external site.)Links to an external site. to complete the lab for this week. All of the directions are included in the document.
The data for this lab are available from your instructor, same as used in Weeks 2 and 4.
The document includes places where you need to input the answers. Any place where you see a gray box is where you need to put an answer.
Deliverables
Fill in the document, save it with your name in the title, and submit the document.
Below is the grading rubric for this assignment.
Category
Points
%
Description
Questions 1–2
5 points each, 10 total
20%
Large sample confidence intervals for a mean
Question 3
10 points
20%
Compare confidence interval outcomes
Questions 4 and 5
15 points each, 30 total
60%
Normal probabilities compared with data outcomes
Total
50 points
100%
A quality lab will meet or exceed all of the above requirements.
Required Software
Microsoft Office: Word and Excel
Use a personal copy, or access the software at https://lab.devry.edu (Links to an external site.)Links to an external site..
Lab Steps
Prepare and Submit Lab
Open Excel.
Open the lab Word document.
Follow the steps in the lab Word document to do calculations in Excel.
Copy and paste from Excel into the Word document, or retype the answer. Complete the answers to the questions in complete sentences (fill in each gray box in the Word document).
Save the lab Word document, and submit it. No other files should be submitted.
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