OpenStudy (anonymous):

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.

5 years ago
OpenStudy (anonymous):

I am only curious about randomness. This question does not indicate that the sample was taken at random, nor the treatments given at random. Can I still use a t-procedure without making inference to cause and effect or without relating the finding to all men who are 80 and take tai chi?

5 years ago
OpenStudy (anonymous):

Perhaps since u cannot generalize your findings to all men who are 80 and took tai chi, nor can u make inference about cause and effect, u cannot use t procedures? or what would be the point? i dunno

5 years ago
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