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 α= 0.05, and follow this with a multiple comparisons analysis if appropriate.

a

step-by-step explanation:

step-by-step explanation:

im not sure what the answer is

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.