For a repeated-measures study comparing three treatment conditions with a sample of n = 4 participants, the participant totals (the p values are 3, 6, 9, and 6. what is the value for ssbetween subjects?

Repeated measures study is when participants of the first treatment are still the participants of the second treatment either to see the effects of the variable. Thank you for your question. Please don't hesitate to ask in your queries. 

The perimeter of a rectangle is the sum of the lengths of all 4 sides.two sides are lengths and two sides are widths.the perimeter is two lengths plus two widths.you know the perimeter and the length.subtract 2 lengths from the perimeter.that gives you 2 widths.then divide that by 2 to get the width.116 cm - 26 cm - 26 cm = 64 cm64 cm is 2 widths combined.64 cm/2 = 32 cmthe width is 32 cm.check: the perimeter is 26 cm + 26 cm + 32 cm + 32 cm.this adds to 116 cm, which is the perimeter we were given, so our width, 32 cm, is correct.