You can use Minitab to analyze the problem .
input you data in Minitab 14 , then go to use graph\probability plot
you can get a graph , check P value , if it is great than 0.05 , the data set should be norminal distribution. otherwise it is no-norminal data
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Honeywell (威望:2)
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input you data in Minitab 14 , then go to use graph\probability plot
you can get a graph , check P value , if it is great than 0.05 , the data set should be norminal distribution. otherwise it is no-norminal data