ANOVA? Random samples

To help the owner decide which of your two current suppliers deserves the larger contract next year, you have rated a random sample of plastic cases from each one.  The data are a composite measure of quality (durability, finish detail, and plastic density), with higher numbers indicating higher quality (See data in file).

Are there any significant differences in quality between the suppliers?

How much of the variation between suppliers is due to things other than quality (durability, finish detail, and plastic density)?

What would you recommend regarding the suppliers?

I am supposed to use one or more of the following techniques (and we are instructed to always use 95% confidence level, unless the problem states otherwise):

-Confidence intervals and hypothesis testing
-Decision trees (and their use in solving managerial problems),
-Critical fractile analysis (and its use in determining optimal demand levels),
-Analysis of variance/ANOVA (and its use in understanding differences between group means),
-Chi-square (cross tabs/contingency table) analysis (and its use in determining differences between group proportions),
-Regression, single and multiple (and its use in understanding relationships between dependent and independent (explanatory) variables), and
-Optimization modeling (and its use in determining the best solution given a set of constraint).

I think this is an ANOVA?  Ido not know how to do this.  Help!!

Attached file(s):

supplier quality.xls  View File