A cigarette company claimed that its cigarettes contain at most 40 mg of nicotine?

daniel

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Ten randomly selected cigarettes were tested. Use the significance level of Alpha=0.01, test the hypotheseis that, mean>40 mg.

Data: 47.3, 39.3, 40.3, 38.3, 46.3, 43.3, 42.3, 49.3, 40.3, 46.3.

Thanks for your help on this, a little confused.
 
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