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Sales representative of a certain pain reliever

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A sales representative of a certain pain reliever claims that the effect would last for 6 hours. A survey from 15 randomly selected workers using the same pain reliever shows that it has an average effect of 5.3 hours with a standard deviation of 1.2 hours. Is the claim of the sales representative true at 5% level of significance?

Reference no: EM132474371

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