Question: I don't understand how you would test if the data shows that there is a difference between some supplies if the testing level is at 1%? Can you show me the steps of how you would test if the data shows that there is a difference between some supplies if the testing level is at 1% based off of the date below?
Background: If a company manufactures clothing and their quality control department measures weekly values of different plant for the percentage difference of waste between the layout on the computer and the actual waste when the clothing is made (called run-up). The data is in table #1
Table #1: Run-ups for Different Plants Making Clothing
Plant 1---------- Plant 2---------- Plant 3---------- Plant 4---------- Plant 5
1.2--------------- 16.4----------------12.1----------------11.5-----------------24
10.1---------------6-------------------9.7------------------10.2-----------------3.7
-2------------------11.6----------------7.4------------------3.8-----------------8.2
1.5----------------1.3------------------2.1------------------8.3-----------------9.2
-3-----------------4--------------------10.1-----------------6.6-----------------9.3
-0.7--------------17-------------------4.7------------------10.2-----------------8
3.2---------------3.8------------------4.6------------------8.8-----------------15.8
2.7---------------4.3------------------3.9------------------2.7-----------------22.3
-3.2--------------10.4----------------3.6------------------5.1------------------3.1
-1.7--------------4.2------------------9.6-----------------11.2----------------16.8
2.4---------------8.5-----------------9.8------------------5.9-----------------11.3
0.3---------------6.3-----------------6.5-----------------13------------------12.3
3.5---------------9-------------------5.7------------------6.8----------------16.9
-0.8--------------7.1----------------5.1------------------14.5---------------19.4
4.3---------------3.4----------------5.2-------------------2.8----------------19.7
-0.8--------------7.3----------------13--------------------3-------------------3.9
7.1---------------42.7---------------7.6------------------0.9-----------------3.4
1.4---------------70.2---------------1.5-----------------0.7------------------3
8.5---------------2.4-----------------6-------------------1.3-----------------2.9