# Business Statistics Discussion and Assignments

****Do not copy or paste from a previous assignment you  may have done for someone else or from the internet. All references and citations must be in and below the appropriate work on a reference page if applicable. All work must be done with substance, no rambling. The professor will be checking for plagiarism and any other type of duplication.****

Assignment- Due Feb 20, 2018: Analyze customer data to reduce errors

Table: Invoice Experiment Error
Customer Size    Customer Location    Product Type    Number of Errors
–                                      –                                    –                                         15
+                                     –                                    –                                         18
–                                     +                                    –                                            6
+                                    +                                    –                                            2
–                                      –                                    +                                         19
+                                     –                                    +                                         23
–                                     +                                    +                                         16
+                                    +                                    +                                         21

Customer Size: Small (-), Large (+)

Customer Location: Foreign (-), Domestic (+)

Product Type: Commodity (-), Specialty (=)

Reference: Moen, Nolan, and Provost (R. D. Moen, T. W. Nolan and L. P. Provost. Improving Quality through Planned Experimentation. New York: McGraw-Hill, 1991)

Use the data in the table above and answer the following questions in the space provided below:(see calculation worksheet)
1. What is the nature of the effects of the factors studied in this experiment?
2. What strategy would you use to reduce invoice errors, given the results of this experiment?

Discussion: Due Feb 20, 2018 1 ½ Paragraphs of substance (no copying and pasting)
• Use the Internet to research articles on confidence interval and its application in business. Select one (1) company or organization which utilized the confidence interval technique to measure its performance parameters (e.g., mean, variance, mean differences between two processes, etc.). Give your opinion as to whether the utilization of such a technique improves business processes for the company or organization that you selected. Justify your response.

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