The sample size is 288 and by Shapiro- Wilk test the data is not normally distributed.
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2$\begingroup$ What was the p-value for the test? $\endgroup$– Michael R. ChernickApr 20, 2018 at 22:26
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1$\begingroup$ What is the purpose of the test and what is your criterion for significance? $\endgroup$– whuber ♦Apr 21, 2018 at 13:50
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