According to a recent study, if a person smoked, the average number of cigarettes smoked per day was 14. A researcher chose a random sample of 40 smokers to investigate the claim, and discovered that the mean number of cigarettes smoked each day was 18.The standard deviation was 6. At ∝= 0.05 (two tailed) , is the number of cigarettes a person smokes per day actually equal to 14?

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