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Sample Case Analysis (Case 10.1)
First read the case carefully. In this instance Cregg Hart is interested in knowing if the rivet diameter from a potential new supplier is the same as the diameter from their existing supplier. This lends itself naturally to do a confidence interval or suitable confidence level, say 95% or do a hypothesis test assuming the mean diameters from the two suppliers are the same.

Next open the Excel file which you can download from CANVAS Excel files and into your computer completely free of charge and run with it.
What should result from assignment is as follows:
Please Note: students in face-to-face classes should turn in a hard copy with a staple on eth top left corner. Students in the online sections should email their cases to their online TA.

Name: Jennifer Johnson
Zhao Jin
OIS – 3440 Applications of Business Statistics
Section “00”
Instructor: Professor Tariq Mughal
Case 10.1 Motive Power Company – part 1

Executive Summary

In case 10 .1 Motive Power Company Part 1, manufacturing manager Cregg Hart is approached by another supplier for rivets. Motive Power is very keen on their quality and are interested in evaluating the new rivets by comparing them to their existing supplier’s rivets. Specifically this is done by comparing the diameters of the two groups of rivets. After collecting data a 95% confidence interval was computed and a statistical test was performed to determine if the average diameters of the two groups of rivets are the same. Conclusions from both statistical techniques led us to believe that both rivet suppliers on average p...

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