An experiment was performed to look at the reflectivity of...

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. What is the value of the pooled variance (s²_p​)?

Source DF SS MS F P

Paint 7.43 0.002

Error

Total 1645.3

S=6.237 R-Sq=​52.71%

A. 7.94

B. 6.237

C. 778

D. 1.273

E. 38.9