Chapter 11.1, Problem 9E

The article “The Effects of a Pneumatic Stool and a One-Legged Stool on Lower Limb Joint Load and Muscular Activity During Sitting and Rising”(Ergonomics, 1993: 519–535) gives the accompanying data on the effort required of a subject to arise from four different types of stools (Borg scale). Perform an analysis of variance using a 5 .05, and follow this with a multiple comparisons analysis if appropriate.