The following data are collected from pregnant women to compare the Plasma ascorbic acid level of smokers and non-smokers.     Table: Plasma ascorbic acid values Non-smokers  0.97, 0.72, 1.00, 0.81, 0.62, 1.32, 1.14, 1.22, 0.90, 0.74, 0.88, 0.94 Smokers  0.88, 0.71, 0.98, 0.79, 1.01, 1.16, 0.78, 1.28   Test whether there is any difference between plasma ascorbic acid levels of smokers and non-smokers. Also find 95% confidence interval for the difference of two means. Describe your findings. Use alpha=0.05  [Hint: use hypothesis, test statistics confidence interval etc.]

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