Develop a scatter plot showing the variables

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Reference no: EM133470008

Assignment: Activities

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:

A. Construct the appropriate null and alternative hypotheses with correct parameters.
B. Develop the decision rule assuming that the sample size is 200 parts and the significance level is 0.01.

In a Word document:

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

Part I

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 Download Downes.

Use Excel to complete the following:

A. 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.

B. Develop a linear regression model to explain the variation in the service rating.

Use Word to complete the following:

A. Describe the model, showing the results of the pertinent hypothesis tests, using a significance level of 0.10.
B. Submit your work in a Word document and attach your Excel file.

Part II

Amazon.com has become one of the most successful online merchants. Two measures of its success are sales and net income/loss figures. The data can be found in the file, Amazon.

Use Excel to complete the following:

A. Construct a scatter plot for Amazon's net income/loss and sales figures for the period 1995-2015.
B. Determine a polynomial model, including its order (or degree), for Amazon's net income/loss and sales figures.

Use Word to complete the following:

A. Explain your process of determining the polynomial model
B. Submit your work in a Word document and attach your Excel file.

Reference no: EM133470008

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