Reference no: EM132892133

An experiment was performed to look at the reflectivity of different paints used on roads. Four paints were used? (call them Paint? 1, Paint? 2, Paint? 3, and Paint? 4). Twenty-four sections of roads with similar travel patterns and weather patterns were used. Each type of paint was randomly assigned to one of the 24 sections of road so that each paint type was used on 6 different road sections. The percent of reflectivity after 6 months was determined and recorded. Because the? p-value from the? F-test is so? low, what should be? done?

Source DF SS MS F P

Paint 7.43 0.002

Error

Total 1645.3

S=6.2 R-Sq=?52.71%

A. Stop the analysis because the? F-test says that all paint types have different means. Because they are all? different, there is nothing more to do.

B. Stop the analysis because we know that at least one paint type has a different mean? reflectivity, but there is no way to determine which one or ones have different means.

C. Perform a multiple comparison method to determine which paint type or paint types have different mean reflectivity.

D. Perform a multiple comparison method to determine if at least one paint type has a different mean reflectivity than other paint types.

E. Stop the analysis as none of the paint types have a different mean reflectivity.