Suppose an editor of a publishing company claims that the mean time to print a textbook is less than 16 days. A sample of 16 textbooks is randomly selected and it is found that the mean time was 13.5 days and Standard deviation was 3.6 days. Assuming the time to print a text book is normally distributed and using a 0.025 level of significance, would you conclude the editor’s claim is true?
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