Create confidence interval for mean age of smokers
A sample of 200 smokers were asked at what age they started smoking. The sample mean was 18.3 years with a standard deviation of 4.35 years. Construct a 95% confidence interval for the mean age that all smokers begin smoking.
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The sample mean was 18.3 years with a standard deviation of 4.35 years. Construct a 95% confidence interval for the mean age that all smokers begin smoking.
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