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statistics help? The birth weights (in grams) are given for babies born to 22 mothers who smoked during their pregnancy and to 35 mothers who

statistics help?

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The birth weights (in grams) are given for babies born to 22 mothers who smoked during their pregnancy and to 35 mothers who didn't smoke during their pregnancy. (Source: Smoking Mothers, Holcomb 2006). For your reference, 3200 grams is about 7 pounds. Non-Smoking Group: 3612 3640 3444 3388 3612 3080 3612 3080 3388 4368 3612 3024 2436 4788 3500 4256 3640 4256 4312 4760 2940 4060 4172 2968 2688 4200 3920 2576 2744 3864 2912 3668 3640 3864 3556 Smoking Group: 3276 1974 2996 2968 2968 5264 3668 3696 3556 2912 2296 1008 896 2800 2688 3976 2688 2002 3108 2030 3304 2912 1 ) Each data set is a sample. What are the intended populations? Explain your answers. 2) Which level of measurement would be used to classify the weights of the babies? 3) Without performing any calculations, do there appear to be any outliers in either the smoking group or the non-smoking group? Explain your answer. 4 ) Calculate the mean, median, standard deviation, Q1, Q3, and the coefficient of variation for each group. Give answers to two decimal places. 5) Which group has more variation: smokers or non-smokers? Does this surprise you? Explain. 6) Let's say that the doctor of an expectant mother wants to estimate the birth weight of her child. Based on what you have calculated so far, would the estimate be more reliable if the mother is a smoker or a non-smoker? Explain your answer. 7) Below are the box plots for each group. Use them to determine if each data distribution appears to be skewed left, skewed right, or close to symmetric. Explain your answers. Variable Smoking Non-Smoking 1000 2000 3000 4000 5000

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