Mary noticed that old coins are smoother and more worn.She weighed 31 nickels and recorded their ages,and then performed a simple regression to estimate the model Weight = β0 + β1 Age,where weight is the weight of the coin in grams and Age is the age of the coin in years.Her results are shown below.Write a brief analysis of these results,using what you have learned in this chapter.Make a prediction of Weight when Age = 10 and also when Age = 20.What does this tell you? Is the intercept meaningful in this regression?

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The Answer of Mary noticed that old coins are smoother and more worn.She weighed 31 nickels and recorded their ages,and then performed a simple regression to estimate the model Weight = β0 + β1 Age,where weight is the weight of the coin in grams and Age is the age of the coin in years.Her results are shown below.Write a brief analysis of these results,using what you have learned in this chapter.Make a prediction of Weight when Age = 10 and also when Age = 20.What does this tell you? Is the intercept meaningful in this regression?

Mary Noticed That Old Coins Are Smoother and More Worn