Reference no: EM133099635

MAT 510 Business Statistics - Strayer University

1. Hypothesis Testing

The Lazer Company has a contract to produce a part for Boeing Corporation that must have an average diameter of 6 inches and a standard deviation of 0.10 inch. The Lazer Company has developed a process that will meet the specifications with respect to the standard deviation, but it is still trying to meet the mean specifications. A test run (considered a random sample) of parts was produced, and the company wishes to determine whether this latest process that produced the sample will produce parts meeting the requirement of an average diameter equal to 6 inches.

Use Excel to:

1. Construct the appropriate null and alternative hypotheses with correct parameters.

2. Develop the decision rule assuming that the sample size is 200 parts and the significance level is 0.01.

In a Word document:
- Recommend what the Lazer Company should conclude if the sample mean diameter for the 200 parts is 6.03 inches.
- Submit your recommendations in a Word document and attach your Excel file.

Institution Release Statement

Part 2:

The research department of an appliance manufacturing firm has developed a solid-state switch for its blender that the research department claims will reduce appliance returns under the one-year full warranty by 3%-6%. To determine if the claim can be supported, the testing department selects a group of the blenders manufactured with the new switch and a group with the old switch and subjects them to a normal year's worth of wear. Out of 250 blenders tested with the new switch, nine would have been returned. Sixteen would have been returned out of the 250 blenders with the old switch. As the manager of the appliance manufacturing process, use a statistical procedure to verify or refute the research department's claim.

Instructions
Create 8-10 slides, including a cover and a sources list, for a presentation to the director of the manufacturing plant in which you:
1. Summarize the problem with the appliance manufacturing firm's blenders.
2. Propose the statistical inference to use to solve the problem. Support your decision using a scholarly reference.
3. Using Excel:
o Develop a flowchart for the proposed statistical inference, including specific steps.
o Compute all statistical calculations using Excel.
4. Place your flowchart in a slide.
5. Determine if you can verify or refute the research department's claim.
6. Choose sources that are credible, relevant, and appropriate. Cite each source listed on your source page at least one time within your assignment. For help with research, writing, and citation, access the library or review library guides. This course requires the use of Strayer Writing Standards. For assistance and

Part 3: Linear Regression Analysis

Terry Downes owns a commercial cleaning company. He has conducted a survey of customers to determine how satisfied they are with the work performed. He devised a 100-point rating scale-with 0 being poor and 100 being excellent service, selected a random sample of 14 customers, and asked them to rate the service. He also recorded the number of worker hours spent in the customer's facility. These are in the file named Downes.

Use Excel to complete the following:

1. Develop a scatter plot showing the variables, rate of service and worker hours, with the y variable on the vertical axis and the x variable on the horizontal axis, and indicating the type of relationship.

2. Develop a linear regression model to explain the variation in the service rating.
Use Word to complete the following:

3. Describe the model, showing the results of the pertinent hypothesis tests, using a significance level of 0.10.

4. Submit your work in a Word document and attach your Excel file.

5. Institution Release Statement

Attachment:- Business Statistics.rar