Help needed on solving step by step.

I. Discuss why in some circumstances it is appropriate to use the randomized complete block design. Give an example which this design could be used.

II. Our company provides computers, printers, and Internet service to several engineers and programmers so that they can telecommute from home. Because of the cost of name-brand printer replacement cartridges, several companies have entered the secondary market. You are currently considering offers from four companies. The prices are equivalent, so you will make your decision based on number of pages printed. You have given samples of four cartridges to 16 programmers and engineers and have received the following numbers of pages:

Supplier A Supplier B Supplier C Supplier D

424 650 521 323

521 725 601 383

650 826 590 487

422 722 522 521

a.Using a significance level equal to 0.01, what conclusion should you reach about the four manufacturers' printer cartridges? Explain.

b.If the test conducted in part a reveal that you should reject the null hypothesis, which supplier should you choose? Is there one or more you can eliminate based on these data? Use the appropriate test for multiple comparisons. Discuss