Tai Chi is often recommended as a way in improve balance and flexibility in the elderly. Below are before-and-after flexibility ratings (on a 1 to 10 scale, 10 being most flexible) for 8 men in their 80’s who took Tai Chi lessons for six months.

Subject A B C D E F G H
Flexibility rating after Tai Chi 2 4 3 3 3 4 5 10
Flexibility rating before Tai Chi 1 2 1 2 1 4 2 6

Do these paired data adequately meet the Normality condition for a t-procedure? Justify your answer.

I am only curious about randomness. This question does not indicate that the sample was tak

Question

Tai Chi is often recommended as a way in improve balance and flexibility in the elderly.  Below are before-and-after flexibility ratings (on a 1 to 10 scale, 10 being most flexible) for 8 men in their 80’s who took Tai Chi lessons for six months.

Subject	A	B	C	D	E	F	G	H
Flexibility rating after Tai Chi	2	4	3	3	3	4	5	10
Flexibility rating before Tai Chi	1	2	1	2	1	4	2	6

Do these paired data adequately meet the Normality condition for a t-procedure?  Justify your answer.

I am only curious about randomness.  This question does not indicate that the sample was tak