9840 Ass

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University of New South of Wales

SCHOOL OF MECHANCIAL AND MANUFACTURING

GSOE 9840 ASSIGNMENT 1

Group members: Jiajun Dong (z3491499)

Xuesi Men (z

Peng Liang (z5004969)

Yuhan Shen (z3436711)

Contents

Contents 2

1. Introduction 3

1.1 Case background 3

2. Issue analysis 5

3. Hypothesis and data analysis 6

3.1 Scratches issue 6

3.1.1 Scratch hypothesis 6

3.1.2 Data analysis 7

3.1.3 Conclusion 9

3.2 Dents issue 9

3.2.1 Dents hypothesis 9

3.2.2 Data analysis 9

3.2.3 Dents conclusion 11

3.3 Tasting issue 12

3.3.1 Tasting hypothesis 12

3.3.2Data analysis 12

3.3.3 Conclusion 15

3.4 Volume issue 15

3.4.1 Volume hypothesis 15

3.3.2Data analysis 15

3.4.3 Conclusion 18

4. Conclusion 18

5. Recommendation 20

6. Reference 22

7. Appendix 23

Appendix A 23

Appendix B 24

Appendix C 25

Appendix C1 25

Appendix C2 26

Appendix C3 27

Appendix C4 28

Appendix D 29

Appendix D1 29

Appendix D2 30

Appendix D3 31

Introduction

This assignment basically focuses on the request of our client Bubbly Limited, to analysis the complaint regarding with the scratches on the can, dents on the can, different kinds of taste of the drink and inconsistent of volume. Within the analysis process, our group uses several test methods and visualizations such as two sample t-test, time series plot and box plot to help in determining which part of the manufacturing process goes wrong. In order to have a better express of our assignment result and give audience a better understanding of our conclusion, we use Minitab to finish the calculation and conduct the graphs related.

The implication of hypothesis testing- that there can always be a simple "yes" or "no" answer as the fundamental result from a medical study-is...